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. 3" Polished SS Tips. Without Heat Shield. American Thunder gives you the...
      Available sound levels: Aggressive Sound / Moderate Sound (depends on application and exhaust type)Increases Power
      $481.97 - $574.97
    • Flowmaster® Force II™ Dual Cat-Back Exhaust System
      (0 reviews)
      # 55560433
      Ford Mustang 2003, Force II™ Aluminized Steel Dual Cat-Back Exhaust System by Flowmaster®. Dual Rear Exit. 2.5" Tubing. 3" Polished SS Tips. The Force II Series is designed for a moderate or mild performance tone experience...
      Available sound levels: Mild Sound / Mild - Moderate Sound (depends on application and exhaust type)Increases Power
      $532.97 - $572.97
    • Flowmaster® Outlaw™ Stainless Steel Dual Cat-Back Exhaust System
      (0 reviews)
      # 81110050
      Ford Mustang GT 2003, Outlaw™ Stainless Steel Dual Cat-Back Exhaust System by Flowmaster®. AGGRESSIVE SOUND. Outlaw® Series Mufflers. Dual Out Dumps Exit. 2.5" Tubing. 2.5" Single Wall Natural SS Round Tips. Tip Length: 6"....
      Moderate - Aggressive SoundMinimal Restriction
      $434.90
    • MagnaFlow® Competition Series Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 1678622
      Ford Mustang GT / Mach I 2003, Competition Series Stainless Steel Cat-Back Exhaust System by MagnaFlow®. AGGRESSIVE SOUND. Dual Split Rear Exit. 3" Tubing. 4" Height x 4" Width x 13" Length Mufflers. The Competition Series is...
      Aggressive SoundDelivers More Horsepower
      $769.32
    • MagnaFlow® Off-Road Pro Series Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 1678637
      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" Height x 4" Width x 14" Length Mufflers. 2.5"...
      $488.53
    • MagnaFlow® Street Series Cat-Back Exhaust System
      (0 reviews)
      # 20209233
      Ford Mustang 2003, Street Series Stainless Steel Cat-Back Exhaust System by MagnaFlow®. MODERATE SOUND. Dual Split Rear Exit. 2.5" Tubing. The Street Series is designed for customers seeking increased performance and better...
      Moderate SoundDelivers More Horsepower
      $642.41 - $661.69
    • Borla® ATAK™ Stainless Steel Dual Cat-Back Exhaust System
      (0 reviews)
      # 50386530
      Ford Mustang GT 2003, ATAK™ Stainless Steel Dual Cat-Back Exhaust System by Borla®, SUPER AGGRESSIVE SOUND. Split Rear Exit. 2.5" Tubing. 4" Inlet x 12" Length Single Round Rolled Angle-Cut Tips. When you want the best...
      Super Aggressive SoundHorsepower and Torque Increased by 7 – 10%
      $847.99
    • Borla® S-Type™ Stainless Steel Dual Cat-Back Exhaust System
      (0 reviews)
      # 86041366
      Ford Mustang GT 2003, S-Type™ Stainless Steel Dual Cat-Back Exhaust System by Borla®, AGGRESSIVE PLUS SOUND. Split Rear Exit. 2.5" Tubing. 4" Inlet x 12" Length Single Round Rolled Angle-Cut Tips. When you want the best...
      Aggressive Plus SoundIncreased exhaust flow for better performance
      $622.99
    • Borla® Touring™ Stainless Steel Dual Cat-Back Exhaust System
      (0 reviews)
      # 50386667
      Ford Mustang GT 2003, Touring™ Stainless Steel Dual Cat-Back Exhaust System by Borla®, MILD GROWL SOUND. Split Rear Exit. 2.5" Tubing. 4" Inlet x 14" Length Single Round Rolled Angle-Cut Tips. When you want the best performing,...
      Mild Growl SoundHorsepower and torque increased by 7 – 10%
      $758.99
    • Gibson® American Muscle Car™ Cat-Back Dual Exhaust System
      (0 reviews)
      # 3728334
      Ford Mustang GT 2003, American Muscle Car™ Dual Cat-Back Exhaust System by Gibson®. Straight Out The Back Exit. 2.5" Inlet / 4" Outlet, 12" Length Polished Stainless Round Double Wall Slash Tips 2.5" Offset Inlet / 2.5" Offset...
      CNC mandrel bent exhaust tubingImproved performance
      $418.50 - $505.16
    • 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)
      # 79634681
      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
    • Pypes® 304 SS Cat-Back Pype Bomb Muffler Delete Kit
      (0 reviews)
      # 68924872
      Ford Mustang 2003, 304 SS Cat-Back Pype Bomb Muffler Delete Kit by Pypes®. The Pypes Phantom Series is designed to give your car or truck a new sleek look. Black is the new color on the market. All Phantom Series products are...
      Superior upgrade for your exhaust systemDesigned to provide outstanding performance
      $409.99
    • Pypes® 409 SS Header-Back Exhaust System without Cats
      (1 reviews)
      # 68924895
      Ford Mustang 2003, 409 SS Header-Back Exhaust System without Cats by Pypes®. 2.5" Tubing. Without Cats. Get a lot of bang for your performance buck with this rewarding exhaust system by Pypes Exhaust. It's a perfect way to beef up...
      Designed to deliver the ultimate in sound and performanceProvides extra punch in the passing lane and improves mileage
      $635.99
    • Pypes® Cat-Back Exhaust System
      (0 reviews)
      # 68926064
      Ford Mustang 2003, Cat-Back Exhaust System by Pypes®. Want that rumble when you start up your truck? How about that growl when you step on the gas and run along side a little Honda hatchback? Pypes' Gas truck systems offer the best...
      409 stainless tubing, muffler, clamps and hangersBetter fuel economy
      $389.99 - $456.99
    • Pypes® Cat-Back Exhaust System
      (1 reviews)
      # 68926068
      Ford Mustang 2003, Cat-Back Exhaust System by Pypes®. Get a lot of bang for your performance buck with this rewarding exhaust system by Pypes Exhaust. It's a perfect way to beef up engine power and torque as well as throttle...
      Designed to deliver the ultimate in sound and performanceProvides extra punch in the passing lane and improves mileage
      $549.99 - $799.99
    • Pypes® Cat-Back Exhaust System with Violator Muffler
      (0 reviews)
      # 68924901
      Ford Mustang GT 2003, Cat-Back Exhaust System with Violator Muffler by Pypes®. 2.5" Tubing. Includes Violator Muffler. Get a lot of bang for your performance buck with this rewarding exhaust system by Pypes Exhaust. It's a perfect...
      Designed to deliver the ultimate in sound and performanceProvides extra punch in the passing lane and improves mileage
      $419.99
    • Pypes® Phantom Series Cat-Back Exhaust System with Black Tips
      (0 reviews)
      # 68924894
      Ford Mustang 2003, Phantom Series Cat-Back Exhaust System with Black Tips by Pypes®. 3" Tubing. Includes Black Tips. The Pypes Phantom Series is designed to give your car or truck a new sleek look. Black is the new color on the...
      Superior upgrade for your exhaust systemDesigned to provide outstanding performance
      $494.99
    • Pypes® Phantom Series Cat-Back Exhaust System with Street-Pro Mufflers
      (0 reviews)
      # 68924897
      Ford Mustang 2003, Phantom Series Cat-Back Exhaust System with Street-Pro Mufflers by Pypes®. 2.5" Tubing. Includes Street-Pro Mufflers. The Pypes Phantom Series is designed to give your car or truck a new sleek look. Black is the...
      Superior upgrade for your exhaust systemDesigned to provide outstanding performance
      $828.99
    • Pypes® Phantom Series Cat-Back Exhaust System with Violator Mufflers
      (0 reviews)
      # 68926072
      Ford Mustang 2003, Phantom Series Cat-Back Exhaust System by Pypes®. The Pypes Phantom Series is designed to give your car or truck a new sleek look. Black is the new color on the market. All Phantom Series products are powder...
      Superior upgrade for your exhaust systemDesigned to provide outstanding performance
      $439.99 - $496.99
    • Pypes® Phantom Series Header-Back Exhaust System without Cats
      (0 reviews)
      # 68924896
      Ford Mustang 2003, Phantom Series Header-Back Exhaust System without Cats by Pypes®. 2.5" Tubing. Without Cats. The Pypes Phantom Series is designed to give your car or truck a new sleek look. Black is the new color on the market....
      Superior upgrade for your exhaust systemDesigned to provide outstanding performance
      $665.99
    • Stainless Works® 304 SS Cat-Back Exhaust System
      (0 reviews)
      # 82924007
      Ford Mustang GT 2V carburetor 2003, 304 SS Cat-Back Exhaust System by Stainless Works®. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion. Engineered with...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $901.00
    • Stainless Works® 304 SS Header Back Exhaust System
      (0 reviews)
      # 82924013
      Ford Mustang SVT Cobra 4V carburetor 2003, 304 SS Header Back Exhaust System by Stainless Works®. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion....
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $927.00 - $1,265.50
    • DynoMax® Super Turbo™ Steel Cat-Back Exhaust System
      (0 reviews)
      # 18215831
      Ford Mustang 3.8L 2003, Super Turbo™ Steel 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...
      Constructed to increase horsepower and torque thanks to improved exhaust flowStainless steel Super Turbo muffler will maintain a mellow performance tone
      $331.68
    • DynoMax® Ultra Flo™ Steel Cat-Back Welded Exhaust System
      (0 reviews)
      # 18216392
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Steel Cat-Back Welded Exhaust System by DynoMax®. Rear Exit. 2.5" Tubing. Includes Aluminized Pipe, U-Bolt Pipe. Dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower....
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueUltra Flo Welded muffler will give your car a deep performance tone
      $313.63
    • SLP® Loud Mouth Axle-Back Exhaust System
      (0 reviews)
      # 71405134
      Ford Mustang GT / Mach I 2003, Loud Mouth Axle-Back Exhaust System by SLP®. SLP's Mustang Loud Mouth® has always been the best performing cat-back exhaust in the business. Now it's the most versatile, too! Using groundbreaking...
      $492.95
    • Flowmaster® Scavenger Series Elite Headers
      (0 reviews)
      # 1257378
      Ford Mustang GT / Mach I 4.6L 2003, Scavenger Series Elite Headers by Flowmaster®. Sema Emissions Code: 1. Replace your restrictive factory exhaust manifolds with these stainless steel headers and let your engine breath! Their long...
      Increases horsepower and torqueImproves engine efficiency and throttle response
      $599.00
    • 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)
      # 55186465
      Ford Mustang GT Standard (Manual) Transmission 2003, Exhaust Headers by BBK®. 1.63" Diameter. Full length headers increase exhaust flow and provide optimal cylinder scavenging for improved power and performance. CAD designed and...
      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® Full Length Headers
      (0 reviews)
      # 79636605
      Ford Mustang Mach I / SVT Cobra / SVT Cobra 10th Anniversary 2003, Exhaust Headers by BBK®. Full length headers increase exhaust flow and provide optimal cylinder scavenging for improved power and performance. CAD designed and dyno...
      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® Premium Series™ Shorty Headers
      (1 reviews)
      # 55186504
      Ford Mustang 3.8L 2003, Exhaust 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 exhaust...
      Developed using CAD (Computer Aided Design) software and dyno-tested for maximum horsepowerAvailable with equal length and unequal length tubes
      $299.99 - $399.99
    • BBK® Tuned-Length Shorty™ Headers with Gaskets
      (0 reviews)
      # 55186479
      Ford Mustang GT 2003, Exhaust Headers with Gaskets by BBK®. 1.63" Diameter. Bolt-on headers increase exhaust flow for improved power and performance. CAD designed and dyno tested shorty headers feature optimized primary tube shape...
      Approximately 12-16 Horsepower GainCNC Mandrel Bent Tubes to Ensure Consistent Diameter Throughout the Tubes
      $339.99 - $439.99
    • Kooks® Stainless Steel Long Tube Headers
      (0 reviews)
      # 82095025
      Ford Mustang 2003, Stainless Steel Long Tube Headers by Kooks®. 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 - $1,344.15
    • Kooks® Steel Long Tube Headers
      (0 reviews)
      # 82095026
      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
    • Flowtech® Long Tube Headers
      (0 reviews)
      # 64825645
      Ford Mustang MFI 2003, Black Painted Long Tube Headers by Flowtech®, 1.625" Diameter / 3" Collector Diameter. Include all mounting hardware. This product is made of high-quality materials to serve you for years to come. Designed...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $332.95 - $365.95
    • Pypes® Stainless Steel Long Tube Headers
      (0 reviews)
      # 68924890
      Ford Mustang 2003, Stainless Steel Long Tube Headers by Pypes®. Still searching for some more horsepower and better sound? Then here’s your solution... and when you install these headers, it will most likely be the...
      304 Stainless Steel ConstructionSuperior upgrade for your exhaust system
      $429.99
    • Stainless Works® Headers
      (0 reviews)
      # 82924010
      Ford Mustang GT 2V carburetor 2003, Headers by Stainless Works®. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion. Engineered with careful attention to...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $1,395.00 - $1,575.00
    • 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" Length, Full Length, Port Shape: Same As Port. All necessary...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $647.95 - $842.95
    • Dynatech® Mustang K-Member Headers
      (0 reviews)
      # 84208652
      Ford Mustang With Chevy Small Block Engine 2003, Mustang K-Member Headers by Dynatech®. 1 Pair. Dynatech Mustang K-Member Headers are the best way to make your Mustang conversion an easy bolt in. The stepped tube design provides...
      $529.99 - $635.99
    • Spec-D® Exhaust Header
      (0 reviews)
      # 78252187
      Ford Mustang 2003, Exhaust Header by Spec-D®. Make whatever you drive run and sound like a high-performance machine with a Spec-D Exhaust System. The Spec-D system replaces your restrictive factory pipes and mufflers with large...
      Dramatically improved exhaust flow compared to restrictive stock systemImproved engine breathing enables increased power output for better performance
      $311.50
    • PaceSetter® Mild Steel Exhaust Header
      (0 reviews)
      # 81960276
      Ford Mustang 2003, by PaceSetter®. Mild Steel. Manufactured using mandrel-bent, 16-gauge mild steel tubing and port-matched, CNC-machined, 3/8"-thick head flanges. They are designed for the best combination of ease of installation,...
      $189.53 - $617.75
    • Hedman Hedders® Standard Duty Uncoated Headers
      (0 reviews)
      # 79419156
      Ford Mustang 3.8L 2003, Standard Duty Uncoated Headers by Hedman Hedders®, 1 Pair. Includes Bolts/Studs, Gaskets. Header made from Steel. Hedman's Standard-duty, Uncoated Headers are manufactured using 18 gauge, mandrel bent...
      $257.59
    • Hedman Hedders® Tork-Step Stepped Headers
      (0 reviews)
      # 79419155
      Ford Mustang 4.6L 2003, Tork-Step Stepped Headers by Hedman Hedders®, 1 Pair. Includes Bolts/Studs, Gaskets. Header made from Steel. These uncoated, standard-duty headers use TORK-STEP stepped tube technology to provide performance...
      $310.49
    • 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
      $116.71
    • 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
      $608.38 - $663.36
    • 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 California Off-Road Pro Series Catalytic Converter
      (0 reviews)
      # 22205539
      Ford Mustang 4.6L 2003, Direct Fit California Off-Road Pro Series Catalytic Converter by MagnaFlow®. 12.25" Width. 2.5" Tubing Diameter. Includes Crossover Pipe, Gasket, Tru-X Assembly. If your car needs replacement, install one...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $642.11
    • 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...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $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...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $886.39 - $974.30
    • Pypes® Catted with Catalytic Converters
      (0 reviews)
      # 68926081
      Ford Mustang 2003, Catted by Pypes®. Includes Catalytic Converters. All model-correct kits install like a dream. Theres no skimping on materials here. All kits include dual 409 stainless reinforcement plates at the welds where they...
      409 stainlesss steel construction resists corrosionAll tubes mandrel bent
      $390.99 - $391.99
    • Pypes® Mini Cats
      (0 reviews)
      # 68926046
      Ford Mustang 2003, Mini Cats by Pypes®. These Mini converters are 409 stainless for heavy duty applications, but weigh only 2.5 lbs and measure only 11" long. Installed, they only take up 7" in length. The 5.0 Litre is rated at...
      409 stainlesss steel construction resists corrosionWith slots and 02 bung
      $214.99 - $305.99
    • SLP® High-Flow Catalytic Converter
      (0 reviews)
      # 82080739
      Ford Mustang 4.6L 2003, High-Flow Catalytic Converter by SLP®.
      $95.95 - $191.95
    • 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
      $97.26
    • Flowmaster® 40 Series Delta Force™ Muffler
      (0 reviews)
      # 848433
      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
      $83.76
    • Flowmaster® 40 Series Original Stainless Steel Muffler
      (0 reviews)
      # 848858
      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
      $89.70
    • 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
      $110.21 - $124.27
    • 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
      $86.41
    • DynoMax® Super Turbo™ Direct Fit Muffler
      (0 reviews)
      # 18220888
      Ford Mustang 2003, Super Turbo™ Direct Fit Stainless Steel Oval 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
      $85.60 - $88.49
    • DynoMax® Ultra Flo™ Direct Fit Polished Muffler
      (0 reviews)
      # 18222602
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Direct Fit Polished Oval 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...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueEngineered to give your car a deep performance tone
      $135.39 - $149.37
    • DynoMax® Ultra Flo™ Direct Fit Welded Muffler
      (0 reviews)
      # 18223223
      Ford Mustang GT / Mach I 2003, Ultra Flo™ Direct Fit Welded Stainless Steel Oval 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...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueEngineered to give your car a deep performance tone
      $102.28




    Guides & Articles

    • Performance Parts
      Engines have often been compared to air pumps, because the engine that’s most efficient in terms of economy and power is the one that can get air in and out of its cylinders the easiest. That’s why most performance modifications like conical air filters, cold air intake systems, headers, and cat-back exhaust systems are aimed at making the intake and exhaust systems less restrictive. These parts increase the flow of air into the engine and ease the flow of exhaust gas out of the engine. Among these components, headers may be the most difficult to install. In this article, we’ll discuss what headers do, their different types, and how much performance they can add to your car.
    • Performance Parts
      You may be wondering why so many aftermarket performance exhaust system manufacturers are offering dual exhaust systems connected by "H-pipe" or "X-pipe" sections. After all, aren't two separate pipes, or so-called "true duals", the best for performance? The answer is no, but to understand why we have to examine how a typical internal combustion engine works.
    • Performance Parts
      It's an age-old question that many have asked. Will an aftermarket exhaust be worth the expense? While they definitely can be, an important question to ask yourself is do you care more about the deeper sound they’re designed to produce, or the added performance gained from being less restrictive? As car enthusiasts, we’ve become accustomed to associating the sound of a car with its exhaust. After all, doesn’t everyone have a childhood memory or two of a car and the particular sound it made?
    • Performance Parts
      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 between these two styles so you can make a more informed purchase.

    Popular Products

    2003 Ford Mustang Performance Exhaust Systems Reviews

    Average rating:  5  5 - 1 reviews
    4.8 of 5
    Flowmaster Super 44's 03 Cobra
    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.
    BPosted by Bill (O Brien, OR) /
    2003 Ford Mustang
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