2003 Ford Mustang Performance Exhaust Systems

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    • Flowmaster® American Thunder™ Dual Cat-Back Exhaust System
      (0 reviews)
      # 23516596
      Ford Mustang 2003, American Thunder™ Dual Cat-Back Exhaust System by Flowmaster®, MODERATE SOUND. Super 40 Series Mufflers. Dual Rear Exit. 2.5" Tubing. American Thunder gives you the classic AGGRESSIVE or MODERATE sound (depends...
      Available sound levels: Aggressive Sound / Moderate Sound (depends on application and exhaust typeIncreases Power
      $467.86 - $558.60
    • Flowmaster® Force II™ Dual Cat-Back Exhaust System
      (0 reviews)
      # 55560433
      Ford Mustang 2003, Force II™ Dual Cat-Back Exhaust System by Flowmaster®. Dual Rear Exit. 2.5" Tubing. The Force II Series is designed for a mild, or mild - moderate performance tone experience (depends on application and exhaust...
      Available sound levels: Mild Sound / Mild - Moderate Sound (depends on application and exhaust type)Increases Power
      $464.92 - $556.16
    • MagnaFlow® Street Series Cat-Back Exhaust System
      (0 reviews)
      # 20209233
      Ford Mustang 2003, Street Series Cat-Back Exhaust System by MagnaFlow®, MODERATE SOUND. The Street Series is designed for customers seeking increased performance and better economy, combined with a powerful and well tuned exhaust...
      Moderate SoundDelivers More Horsepower
      $642.41 - $661.69
    • MagnaFlow® Competition Series Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 20206286
      Ford Mustang GT / Mach I 2003, Competition Series Stainless Steel Cat-Back Exhaust System by MagnaFlow®, AGGRESSIVE SOUND. Dual Split Rear Exit. 3" Tubing. The Competition Series is designed for customers seeking maximum...
      $769.32
    • MagnaFlow® Off-Road Pro Series Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 1678640
      Ford Mustang 4.6L 2003, Off-Road Pro Series Stainless Steel Cat-Back Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. Turn Down In Front Of Rear Tire Exit. 2.5" Tubing. 4" x 14" Muffler. 2.5" Turn Down Tip. The Off Road...
      $488.53
    • Borla® Touring™ Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 50386667
      Ford Mustang GT 2003, Touring™ Stainless Steel Cat-Back Exhaust System by Borla®, MILD GROWL SOUND. Split Rear Exit. 4" Inlet / 14" Length Single Round Rolled Angle-Cut Tips. 2.5" Tubing. When you want the best performing, best...
      Mild Growl SoundHorsepower and torque increased by 7 – 10%
      $758.99
    • Borla® S-Type™ Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 35802658
      Ford Mustang GT 2003, S-Type™ Stainless Steel Cat-Back Exhaust System by Borla®, AGGRESSIVE PLUS SOUND, Split Rear Exit. 4" Inlet / 12" Length Single Round Rolled Angle-Cut Tips. 2.5" Tubing. When you want the best performing,...
      Aggressive Plus SoundIncreased exhaust flow for better performance
      $622.99
    • Borla® ATAK™ Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 50386530
      Ford Mustang GT 2003, ATAK™ Stainless Steel Cat-Back Exhaust System by Borla®, SUPER AGGRESSIVE SOUND. Split Rear Exit. 4" Inlet / 12" Length Single Round Rolled Angle-Cut Tips. 2.5" Tubing. When you want the best performing,...
      Super Aggressive SoundHorsepower and Torque Increased by 7 – 10%
      $847.99
    • Gibson® American Muscle Car™ Cat-Back Dual Exhaust System
      (0 reviews)
      # 3728334
      Ford Mustang GT 2003, American Muscle Car™ Cat-Back Dual Exhaust System by Gibson®. Straight Out The Back Exit. 2.5" Inlet / 4" Outlet Polished Stainless Round Double Wall Slash Tips, 12" Length. 2.5" Offset Inlet / 2.5" Offset...
      CNC mandrel bent exhaust tubingImproved performance
      $369.26 - $445.73
    • ARK Performance® DT-S Stainless Steel Cat-Back Exhaust System with Polished Tip
      (0 reviews)
      # 16118522
      Ford Mustang GT 2003, DT-S Stainless Steel Cat-Back Exhaust System with Polished Tip by ARK Performance®. 3.5" Dual Layer Tip. Tube Diameter: 2.5". With the many varieties of exhausts that ARK has to offer, the DT-Series premium...
      CNC Machined FlangesAll Bolt-on System
      $934.15
    • BBK® Varitune Cat-Back Exhaust Kit with SS Tips
      (0 reviews)
      # 55185391
      Ford Mustang GT 2003, Varitune Cat-Back Exhaust Kit with SS Tips by BBK®. This revolutionary performance muffler is fully adjustable for sound and horsepower. It transforms from a mild three-chamber to a more radical...
      Fully adjustable performance mufflersCan be adjusted for horsepower and sound
      $499.99
    • DynoMax® Super Turbo™ Cat-Back Exhaust System
      (0 reviews)
      # 18215831
      Ford Mustang 3.8L 2003, Super Turbo™ Cat-Back Exhaust System by DynoMax®. Rear Exit. 2.5" Tubing. With U-Bolt Pipe, Front Pipe, Mufflers, Tail Pipes, Clamps, Brackets. Dyno proven to flow up to 70 SCFM. Get improved exhaust flow...
      Constructed to increase horsepower and torque thanks to improved exhaust flowStainless steel Super Turbo muffler will maintain a mellow performance tone
      $340.50
    • DynoMax® Ultra Flo™ Cat-Back Exhaust System
      (0 reviews)
      # 18216232
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Cat-Back Exhaust System by DynoMax®. Rear Exit. 2.5" Tubing. Includes Aluminized Pipe. CRF Technology absorbs unwanted interior resonance while maintaining a deep performance tone. This...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueUltra Flo Polished mufflers will give your car a deep performance tone
      $435.77
    • DynoMax® Ultra Flo™ Cat-Back Welded Exhaust System
      (0 reviews)
      # 18216395
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Cat-Back Welded Exhaust System by DynoMax®. Rear Exit. 2.5" Tubing. Includes Aluminized Pipe, U-Bolt Pipe. Dyno proven to flow up to 2 SCFM and support up to 2 horsepower. This cat-back...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueUltra Flo Welded muffler will give your car a deep performance tone
      $330.00
    • Flowmaster® Scavenger Series Elite Headers
      (0 reviews)
      # 1257378
      Ford Mustang GT / Mach I 4.6L 2003, Scavenger Series Elite Headers by Flowmaster®. Replace your restrictive factory exhaust manifolds with these stainless steel headers and let your engine breath! Their long tube design will...
      Increases horsepower and torqueImproves engine efficiency and throttle response
      $682.12
    • MagnaFlow® Ceramic Coated Performance Header
      (0 reviews)
      # 49303729
      Ford Mustang 4.6L 2003, Ceramic Coated Performance Header by MagnaFlow®, 1.75" Tubing. Includes Drivers / Passenger Side, Hardware Kit. These headers are a cost effective an easy way to boost your vehicle's horsepower and torque in...
      Increases Horsepower and Torque to your engineDurable Stainless Steel Ceramic Coated Construction
      $770.45
    • BBK® Full Length Headers
      (0 reviews)
      # 55186591
      Ford Mustang 2003, Full Length Headers by BBK®. Gain 30 plus dyno-proven horsepower just by bolting on a set of BBK long tube, full length headers. These premium headers are CAD designed with a one-piece laser cut exhaust flange,...
      Dyno Testing Results Show a Typical Increase of 30 HorsepowerCNC Mandrel Bent Tubes to Ensure Consistent Diameter throughout the Tubes
      $499.99 - $599.99
    • BBK® Tuned-Length Shorty™ Headers with Gaskets
      (0 reviews)
      # 55186479
      Ford Mustang GT 2003, Tuned-Length Shorty™ Headers with Gaskets by BBK®. 1.63" Diameter. Get 12-16 more ponies from your engine with an easy bolt-on installation. These shorty exhaust headers are direct replacements for your...
      Approximately 12-16 Horsepower GainCNC Mandrel Bent Tubes to Ensure Consistent Diameter Throughout the Tubes
      $319.99 - $419.99
    • BBK® Premium Series™ Shorty Headers
      (1 reviews)
      # 55186504
      Ford Mustang 3.8L 2003, Premium Series™ Shorty Headers by BBK®. 1.63" Diameter. Get at least 10 more ponies from your engine with an easy bolt-on installation. These shorty exhaust headers are direct replacements for your factory...
      Developed using CAD (Computer Aided Design) software and dyno-tested for maximum horsepowerAvailable with equal length and unequal length tubes
      $299.99 - $399.99
    • Kooks® K-Member Headers
      (0 reviews)
      # 64455536
      Ford Mustang 2003, K-Member Headers by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Kooks will last a...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $370.79
    • Kooks® Stainless Steel Long Tube Headers
      (0 reviews)
      # 64456734
      Ford Mustang 2003, Stainless Steel Long Tube Headers by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $1,099.73 - $1,344.15
    • Kooks® Steel Long Tube Headers
      (0 reviews)
      # 64456741
      Ford Mustang 2003, Steel Long Tube Headers by Kooks®. O2 extensions, gaskets, and all installation hardware included. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $1,099.73 - $1,210.03
    • Hooker® Super Competition Full Length Header
      (0 reviews)
      # 64182978
      Ford Mustang Mach I / SVT Cobra / SVT Cobra 10th Anniversary 2003, Super Competition Full Length Header by Hooker®. 1.625" Diameter / 3" Collector Diameter / 8" Lenght, Full Length, Port Shape: Same As Port. This product is made of...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $640.95
    • Flowmaster® Direct Fit Stainless Steel Catalytic Converter
      (0 reviews)
      # 34450743
      Ford Mustang 2003, Direct Fit Stainless Steel Catalytic Converter by Flowmaster®, 2.25" Inlet / 2.25" Outlet. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental regulations...
      Exceed all federal emission standardsStainless Steel shells
      $590.72 - $644.10
    • Flowmaster® 282 Series Stainless Steel OBDII Oval Catalytic Converter
      (0 reviews)
      # 868759
      Ford Mustang SVT Cobra 10th Anniversary 2003, 282 Series Stainless Steel OBDII Oval Catalytic Converter by Flowmaster®, 2.25" Inlet / 2.25" Outlet. 12" Length. 6.13" Width. Location: Rear Side. Includes Heat Shield. The new...
      Exceed all federal emission standardsStainless Steel shells
      $113.32
    • MagnaFlow® Direct Fit California OBDII Catalytic Converter
      (0 reviews)
      # 22205557
      Ford Mustang 2003, Direct Fit California OBDII Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $1,062.88 - $1,141.00
    • MagnaFlow® Direct Fit Federal Catalytic Converter
      (0 reviews)
      # 61588472
      Ford Mustang 2003, Direct Fit Federal Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace the...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $709.89 - $772.61
    • MagnaFlow® Direct Fit Federal OEM Grade Catalytic Converter
      (0 reviews)
      # 61588473
      Ford Mustang 2003, Direct Fit Federal OEM Grade Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $886.39 - $974.30
    • MagnaFlow® Direct Fit Off-Road Pro Series Catalytic Converter
      (0 reviews)
      # 22205539
      Ford Mustang 4.6L 2003, Direct Fit Off-Road Pro Series Catalytic Converter by MagnaFlow®. 12.25" Wide. Includes Crossover Pipe, Gasket, Tru-X Assembly. If your car needs replacement, install one that will get you through the smog...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $642.11
    • Eastern® Direct Fit Catalytic Converter
      (0 reviews)
      # 17572644
      Ford Mustang 2003, Direct Fit Y-Pipe Catalytic Converter by Eastern Catalytic®. If you need to replace your failed or damaged catalytic converter, this product is the right choice. Designed specifically for your vehicle, this...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $519.59 - $839.73
    • Flowmaster® 40 Series Delta Flow™ Muffler
      (2 reviews)
      # 849741
      Ford Mustang 2003, 40 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The 2-chamber design of this muffler, incorporating the patented...
      The Quietest Option in the 40 Series Two Chamber LineLess Resonance than other 40 Series Mufflers
      $94.44
    • Flowmaster® 40 Series Delta Force™ Muffler
      (0 reviews)
      # 849852
      Ford Mustang GT / SVT Cobra 10th Anniversary 2003, 40 Series Delta Force™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Offset Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall...
      The Original High Performance Flowmaster MufflerAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $81.32
    • Flowmaster® 40 Series Original Stainless Steel Muffler
      (0 reviews)
      # 849851
      Ford Mustang GT / SVT Cobra 10th Anniversary 2003, 40 Series Original Stainless Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Offset Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length....
      The Original High Performance Flowmaster MufflerAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $87.08
    • Flowmaster® 50 Series Delta Flow™ Muffler
      (1 reviews)
      # 849946
      Ford Mustang GT / Mach I 2003, 50 Series Delta Flow™ Muffler by Flowmaster®, MODERATE SOUND, 2.25" Offset Inlet / 2.25" Offset Outlet, 4" Thick x 9.75" Wide x 17" Case Length x 23" Overall Length. The 50 Series Delta Flow...
      Three Chamber Delta Flow TechnologyFully MIG-Welded for Maximum Durability
      $107.02 - $120.66
    • Flowmaster® Super 44 Series Delta Flow™ Muffler
      (1 reviews)
      # 850153
      Ford Mustang 2003, Super 44 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The Super 44 has the...
      Deep, Aggressive, High Performance Exhaust NoteTwo-Chamber Design for Power and Torque Increase
      $83.90
    • DynoMax® Super Turbo™ Direct Fit Muffler
      (0 reviews)
      # 18220888
      Ford Mustang Base / GT / Mach I 2003, Super Turbo™ Direct Fit Muffler by DynoMax®. 3" Offset Inlet / 2.5" Offset Outlet. 14" Body Length, 8.81" Body Width, 4.25" Body Height. No Reversible. Get improved exhaust flow and reduced...
      Constructed to increase horsepower and torque thanks to improved exhaust flowAluminized steel Super Turbo muffler maintains a mellow performance tone
      $87.34 - $93.57
    • DynoMax® Ultra Flo™ Direct Fit Polished Muffler
      (0 reviews)
      # 18222602
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Direct Fit Muffler by DynoMax®. 3" Offset Inlet / 2.5" Offset Outlet. 14" Body Length, 8.81" Body Width, 4.25" Body Height. No Reversible. CRF Technology absorbs unwanted interior...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueEngineered to give your car a deep performance tone
      $135.39 - $140.81
    • DynoMax® Ultra Flo™ Direct Fit Welded Muffler
      (0 reviews)
      # 18223223
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Direct Fit Welded Muffler by DynoMax®. 3" Offset Inlet / 2.5" Offset Outlet. 14" Body Length, 9.75" Body Width, 4.5" Body Height. No Reversible. Dyno proven to flow up to 2 SCFM and...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueEngineered to give your car a deep performance tone
      $102.28
    • BBK® eXtracter Series™ High-Flow Short Mid X-Pipe with Converters
      (0 reviews)
      # 55185420
      Ford Mustang GT / SVT Cobra / SVT Cobra 10th Anniversary 2003, eXtracter Series™ High-Flow Short Mid X-Pipe with Converters by BBK®. X-pipes increase exhaust flow to gain horsepower by allowing both cylinder banks to make use of...
      Provides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust systemX-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
      $409.99
    • BBK® eXtracter Series™ High-Flow Short Off-Road X-Pipe
      (0 reviews)
      # 55185419
      Ford Mustang GT / SVT Cobra / SVT Cobra 10th Anniversary 2003, eXtracter Series™ High-Flow Short Off-Road X-Pipe by BBK®. X-pipes increase exhaust flow to gain horsepower by allowing both cylinder banks to make use of both sides...
      Provides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust systemX-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
      $199.99
    • BBK® Off-Road X-Pipe Assembly
      (0 reviews)
      # 55185421
      Ford Mustang GT / SVT Cobra / SVT Cobra 10th Anniversary 2003, Off-Road X-Pipe Assembly by BBK®. X-pipes increase exhaust flow to gain horsepower by allowing both cylinder banks to make use of both sides of the exhaust system....
      Dyno testing shows solid gains of 15-20 horsepower depending on applicationProvides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust system
      $219.99
    • BBK® X-Pipe Assembly with Converters
      (0 reviews)
      # 55185422
      Ford Mustang GT / SVT Cobra / SVT Cobra 10th Anniversary 2003, X-Pipe Assembly with Converters by BBK®. X-pipes increase exhaust flow to gain horsepower by allowing both cylinder banks to make use of both sides of the exhaust...
      Dyno testing shows solid gains of 15-20 horsepower depending on applicationProvides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust system
      $419.99
    • BBK® High-Flow Short H-Pipe Assembly with Converters
      (0 reviews)
      # 55185418
      Ford Mustang GT / SVT Cobra / SVT Cobra 10th Anniversary 2003, High-Flow Short H-Pipe Assembly with Converters by BBK®. H-pipes increase exhaust flow to gain horsepower by allowing both cylinder banks to make use of both sides of...
      Provides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust systemH-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
      $379.99
    • BBK® High-Flow Short Off-Road Mid H-Pipe Assembly
      (0 reviews)
      # 55185417
      Ford Mustang GT / SVT Cobra / SVT Cobra 10th Anniversary 2003, High-Flow Short Off-Road Mid H-Pipe Assembly by BBK®. H-pipes increase exhaust flow to gain horsepower by allowing both cylinder banks to make use of both sides of the...
      Provides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust systemH-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
      $179.99
    • BBK® High-Flow Aluminized Steel X-Pipe with Converters
      (0 reviews)
      # 55498572
      Ford Mustang 2003, High-Flow Aluminized Steel X-Pipe with Converters by BBK®. Reduce restriction and increase exhaust flow for more power and better performance, with these large diameter high-flow exhaust tubes. X-pipes increase...
      Provides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust systemX-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
      $479.99
    • BBK® Off-Road X-Pipe
      (0 reviews)
      # 55498571
      Ford Mustang 2003, Off-Road X-Pipe by BBK®. 3" Diameter. Reduce restriction and increase exhaust flow for more power and better performance, with these large diameter high-flow exhaust tubes. X-pipes increase exhaust flow to gain...
      Provides optimal exhaust flow for the most possible increase in horsepower while retaining an exhaust systemX-pipe allows exhaust from both banks to exit using both sides of the exhaust system, for the least restriction and greatest exhaust flow
      $249.99
    • DynoMax® Intermediate Pipe
      (0 reviews)
      # 18219754
      Ford Mustang GT / Mach I 2003, Intermediate Pipe by DynoMax®. 2.75" Inlet / 2.5" Outlet. With their great selection of exhaust pipes and accessories, DynoMax will provide you with everything necessary to complete the exhaust job....
      Designed to ensure unrestricted exhaust flowDirect fit – no modifications needed to install
      $18.98 - $22.00
    • DynoMax® X-Pipe
      (0 reviews)
      # 18216645
      Ford Mustang GT / Mach I Standard Transmission 2003, X-Pipe by DynoMax®. With their great selection of exhaust pipes and accessories, DynoMax will provide you with everything necessary to complete the exhaust job. Every component...
      Designed to ensure unrestricted exhaust flowDirect fit – no modifications needed to install
      $197.47
    • DynoMax® Y-Pipe
      (0 reviews)
      # 18216669
      Ford Mustang 3.8L 2003, Y-Pipe by DynoMax®. 2.63" Inlet / 2.5" Outlet. With their great selection of exhaust pipes and accessories, DynoMax will provide you with everything necessary to complete the exhaust job. Every component is...
      Designed to ensure unrestricted exhaust flowDirect fit – no modifications needed to install
      $58.24
    • DynoMax® Tail Pipe
      (0 reviews)
      # 18221877
      Ford Mustang 2003, Tail Pipe by DynoMax®. With their great selection of exhaust pipes and accessories, DynoMax will provide you with everything necessary to complete the exhaust job. Every component is manufactured from quality...
      Designed to ensure unrestricted exhaust flowDirect fit – no modifications needed to install
      $113.86 - $133.01
    • Kooks® Off-Road Stainless Steel X-Pipe
      (0 reviews)
      # 64456680
      Ford Mustang GT 2003, Off-Road Stainless Steel X-Pipe by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $349.87 - $429.70
    • Kooks® Stainless Steel Catted X-Pipe
      (0 reviews)
      # 64456691
      Ford Mustang GT 2003, Stainless Steel Catted X-Pipe by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $498.93 - $993.57
    • Spectre Performance® Exhaust Header Gaskets
      (0 reviews)
      # 12055020
      Ford Mustang GT / Mach I / SVT Cobra / SVT Cobra 10th Anniversary 2003, Exhaust Header Gaskets by Spectre Performance®. Rooted in racing, Spectre Performance designs and builds every product with the same goal in mind - the best...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      $8.35 - $16.70
    • BBK® Premium™ Header Gasket Set
      (0 reviews)
      # 55186600
      Ford Mustang 2003, Premium™ Header Gasket Set by BBK®. These premium steel core graphite gaskets are flexible for a long lasting leak-proof seal even when cylinder head and header flange surfaces aren’t perfectly flat. They can...
      Provides a long lasting, leak-proof sealFlexible graphite will conform to surface irregularities and won’t stick to headers or cylinder head
      $39.99
    • DynoMax® Bracket
      (0 reviews)
      # 18216804
      Ford Mustang 3.8L 2003, Bracket by DynoMax®. Uses existing exhaust rod brackets or holes. Dual Exhaust. Hardware and accessories are manufactured to work seamlessly with all Dynomax performance parts, making installation quick and...
      Designed to do the exhaust job quickly and easilyOE-style fit, design, and finish
      $22.52 - $29.48
    • Dorman® Exhaust Manifold Hardware Kit
      (0 reviews)
      # 16498883
      Ford Mustang 3.8L 2003, Exhaust Manifold Hardware Kit by Dorman®, 1 Pieces. This is an aftermarket part that replaces factory OE # N800419-S301, W701768-S431. Packaging Type: Box. More like a complete kit than a single part, many...
      Direct replacement for a proper fit every timeDurable steel construction
      $19.30
    • Walker® Direct Fit Catalytic Converter
      (0 reviews)
      # 17728796
      Ford Mustang 2003, Direct Fit Catalytic Converter by Walker®. This catalytic converter is constructed specially for your vehicle to directly replace the original equipment part and comes ready to install. The part is designed to...
      Designed to meet your vehicle’s specific emissions requirementsDirect fit replacement
      $514.24 - $683.87
    • Walker® Universal Fit Catalytic Converter
      (0 reviews)
      # 17738898
      Ford Mustang 2003, Universal Catalytic Converter by Walker®. This part features the correct load of precious metals to ensure the proper limitation of tailpipe emissions. It is designed to meet the EPA policy and emission reduction...
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $91.29 - $148.93
    • DEC® Catalytic Converter
      (0 reviews)
      # 7642172
      Ford Mustang 3.8L 2003, Catalytic Converter by DEC®. Not legal for sale or use in California and New York. Note: (48-State and Canada) EPA Tier 0 and Tier 1 emission use. Is your car noisier these days? Can you smell exhaust fumes...
      $943.41
    • DEC® Catalytic Converter and Pipe Assembly
      (0 reviews)
      # 64458599
      Ford Mustang GT 2003, Catalytic Converter and Pipe Assembly by DEC®. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail again. These catalytic converters are made from a heavy duty...
      Direct fitMade from a heavy duty stainless steel outer shell
      $603.28



    Guides & Articles
    Regardless of whether you're shopping for a simple replacement muffler that delivers original equipment (OE) sound and performance or an upgraded muffler which provides a deeper growl with increased power through freer exhaust flow, you'll see choices between "direct fit" mufflers and "universal" mufflers. In this article, we'll help you understand the differences...
    It has been a battle of the ages to make exhaust sound like it should. Having less bends or turns will not only improve the sound but also performance. A custom exhaust is always an option for the race inspired and spirited weekend warriors. Our manufactures offer everything needed to build a custom exhaust to your preference.
    Headers are installed because the stock exhaust manifolds usually flow poorly. An exhaust header has individual tubes for each exhaust port, allowing each exhaust pulse to flow unobstructed from the cylinder head. The tubes on headers are usually larger in diameter than the runners on an exhaust manifold and the tubes are mandrel bent for gradual radius bends.
    Popular Popular Products

    2003 Ford Mustang Performance Exhaust Systems Reviews
    Average rating: 5 4.8 - 1 reviews
    (4.8)
    APPEARANCE
    EASE OF INSTALLATION
    PRICE/VALUE
    QUALITY
    2003 Ford Mustang | Posted by Bill | (O Brien, OR)

    I purchased these Flowmaster Super 44s for my catless 03 Mustang Cobra, they sound awesome however, they are extremely loud! There is a bit of rasp between 2-3k rpm. At first i thought there was an old baffle from my stock mufflers stuck in my tail pipes, turns out it just rasp. I'm seriously considering a good quality high flow catted x pipe to remove the rasp. Buyers be aware they ship from Flowmaster , so expect a two week delivery.

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