2004 Subaru WRX Performance Exhaust Systems

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    • Flowmaster® dBX™ Stainless Steel Single Cat-Back Exhaust System
      (0 reviews)
      Subaru WRX / WRX STI 2004, dBX™ Stainless Steel Single Cat-Back Exhaust System by Flowmaster®, MODERATE SOUND. DBX® Series Muffler. Single Rear Exit. 3" Tubing. 4" Polished Stainless Steel Tip. The dBX Series produces an exhaust...
      $569.18$455.34
      # 24459547
    • MagnaFlow® Street Series Cat-Back Exhaust System
      (0 reviews)
      Subaru WRX / WRX STI 2004, 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...
      Moderate SoundDelivers More Horsepower
      $857.05from $685.64 - $685.69
      # 35201460
    • Borla® Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      Subaru WRX EJ205 2004, Stainless Steel Cat-Back Exhaust System by Borla®, AGGRESSIVE SOUND, Single Left Rear Exit. 4" Inlet / 8" Length Single Round Half-Rolled Angle-Cut Phantom Tip. 2.5" Tubing. When you want the best performing,...
      Throatier Exhaust NoteHorsepower and Torque Increased by 7 – 10%
      $669.99$535.99
      # 50384416
    • Borla® Touring™ Stainless Steel Cat-Back Exhaust System
      (1 reviews)
      Subaru WRX EJ205 2004, Touring™ Stainless Steel Cat-Back Exhaust System by Borla®, MILD GROWL SOUND. Dual Left Rear Exit. 3.19" x 6" Inlet / 6" Length Dual Round Rolled Angle-Cut Long Tips. 3" Tubing. When you want the best...
      Mild Growl SoundHorsepower and torque increased by 7 – 10%
      $849.99$679.99
      # 50386768
    • Borla® S-Type™ Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      Subaru WRX STI EJ257 2004, S-Type™ Stainless Steel Cat-Back Exhaust System by Borla®, AGGRESSIVE PLUS SOUND, Single Left Rear Exit. 4.5" Inlet / 7.75" Length Single Round Rolled Angle-Cut Phantom Tip. 3" Tubing. When you want the...
      Aggressive Plus SoundIncreased exhaust flow for better performance
      $726.24$580.99
      # 26117591
    • ARK Performance® N-II Stainless Steel Cat-Back Exhaust System with Polished Tip
      (0 reviews)
      Subaru WRX 2004, N-II Stainless Steel Cat-Back Exhaust System with Polished Tip by ARK Performance®. 4.5" Single Tip. 3" Pipe. The ARK N-II cat-back exhaust system offers straight-through technology, offset tip design, and large...
      All Bolt-on SystemStraight-through Muffler Core
      $1,337.69$1,070.15
      # 16118542
    • Agency Power® Cat-Back Exhaust System
      (0 reviews)
      Subaru WRX / WRX STI 2004, Cat-Back Exhaust System by Agency Power®. The Cat-Back is designed for customers seeking increased performance and better economy, combined with a powerful and well tuned exhaust note, making a real...
      Suitable for Everyday DrivingIncreases Power
      $1,000.00$800.00
      # 15847517
    • DC Sports® Polished Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      Subaru WRX / WRX STI 2004, Polished Stainless Steel Cat-Back Exhaust System by DC Sports®. Single Canister. DC Sports race-inspired Single Canister systems are available for V6 and select four-cylinder application. Our Single...
      $646.58$517.26
      # 45401509
    • Agency Power® Stainless Steel Header
      (0 reviews)
      Subaru WRX 2004, Stainless Steel Header by Agency Power®. Adding a high quality exhaust header is a great way to gain power for your car. The Agency Power stainless steel exhaust header is constructed with quality in mind and the...
      Increases horsepower and torqueManufactured from 304 stainless steel
      $875.00$700.00
      # 15847894
    • DC Sports® Polished Stainless Steel Turbo Manifold
      (0 reviews)
      Subaru WRX / WRX STI 2004, Polished Stainless Steel Turbo Manifold by DC Sports®. DC Sports Turbo Manifolds are the perfect upgrade for customers looking to extract the most power from their factory turbocharged vehicle. Because of...
      $547.48$437.98
      # 11019108
    • MagnaFlow® Direct Fit Federal OEM Grade Catalytic Converter
      (0 reviews)
      Subaru WRX / WRX STI 2004, Direct Fit Federal OEM Grade Catalytic Converter by MagnaFlow®. 2.5" Inlet / Outlet Diameter. 7.63" Wide. Without Air Tube. If your car needs replacement, install one that will get you through the smog...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $498.45from $398.76 - $583.50
      # 42443872
    • MagnaFlow® Direct Fit Federal Pre-OBDII Catalytic Converter
      (0 reviews)
      Subaru WRX / WRX STI 2004, Direct Fit Federal Pre-OBDII Catalytic Converter by MagnaFlow®. 2.5" Inlet / 2.5" Outlet Diameter. 7.63" Wide. Without Air Tube. If your car needs replacement, install one that will get you through the...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $400.39from $320.31 - $485.43
      # 42443876
    • DC Sports® Polished Stainless Steel Turbo Up-Pipe
      (0 reviews)
      Subaru WRX / WRX STI 2004, Polished Stainless Steel Turbo Up-Pipe by DC Sports®. DC Sports competition pipes delete the catalytic to eliminate restriction in the exhaust path and are dyno tuned to deliver incredible performance...
      $143.01$114.41
      # 45401513
    • Bosal® Rear Catalytic Converter
      (0 reviews)
      Subaru WRX 2004, Rear Catalytic Converter by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and use advanced manufacturing...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      Call for Pricing
      # 49846359
    • Eastern® Direct Fit Catalytic Converter
      (0 reviews)
      Subaru WRX STI 2004, Direct Fit Pre Cat Catalytic Converter by Eastern Catalytic®. 24.5" Overall Length. ECO II. 5 Bolt Welded. 2 Bolt Welded. One Front Gasket. One Rear Gasket. If you need to replace your failed or damaged...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $296.33$237.06
      # 17569965
    • Flowmaster® 40 Series Delta Flow™ Muffler
      (0 reviews)
      Subaru WRX / WRX STI 2004, 40 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Center Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The 2-chamber...
      The Quietest Option in the 40 Series Two Chamber LineLess Resonance than other 40 Series Mufflers
      $118.05$94.44
      # 34441976
    • Flowmaster® 40 Series Delta Force™ Muffler
      (0 reviews)
      Subaru WRX / WRX STI 2004, 40 Series Delta Force™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Center Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. This is the...
      The Original High Performance Flowmaster MufflerAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $101.65$81.32
      # 34439620
    • Flowmaster® 40 Series Original Stainless Steel Muffler
      (0 reviews)
      Subaru WRX / WRX STI 2004, 40 Series Original Stainless Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Center Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. This is the muffler...
      The Original High Performance Flowmaster MufflerAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $108.85$87.08
      # 34439621
    • Flowmaster® Super 44 Series Delta Flow™ Muffler
      (0 reviews)
      Subaru WRX / WRX STI 2004, Super 44 Series Delta Flow™ Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Center 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
      $104.88from $83.90 - $94.44
      # 34441975
    • Flowmaster® dBX Series™ Stainless Steel Laminar Flow Muffler
      (0 reviews)
      Subaru WRX / WRX STI 2004, dBX Series™ Stainless Steel Laminar Flow Muffler by Flowmaster®, MODERATE SOUND, 2.5" Center Inlet / 2.5" Center Outlet, 6" Diameter x 14" Case Length. dBX Laminar Flow mufflers have a patented core...
      Laminar Flow Muffler TechnologyCool Shell Technology for Low Exterior Heat
      $196.73$157.38
      # 848580
    • Skunk2® MegaPower™ Muffler
      (0 reviews)
      Subaru WRX 2004, MegaPower™ Muffler by Skunk2®. 5.25" Canister. 2.25" Inlet Diameter. Skunk2 muffler is designed to maximize exhaust flow and power. Each muffler by Skunk2 is constructed from T-304 stainless steel and TIG welded...
      Increases performance by maximizing power and flowConstructed from T-304 stainless steel
      $197.49$157.99
      # 38815910
    • Ansa® Muffler
      (0 reviews)
      Subaru WRX 2.0L 2004, Muffler by Ansa®. Position: Rear. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for safety and legal reasons, but before you waste...
      $413.29$330.63
      # 7771143
    • Injen® Downpipe
      (0 reviews)
      Subaru WRX Sti 2004, Downpipe by Injen®. Eliminate restriction and maximize exhaust flow with this quality stainless steel downpipe.
      $377.73from $302.18 - $439.88
      # 379193
    • Agency Power® Downpipes
      (0 reviews)
      Subaru WRX 2004, Downpipes by Agency Power®. When adding an Agency Power Racing Downpipe to your turbo car, you will gain more horsepower and overall performance. The downpipe allows for better flow of the turbine and wastegate...
      Gives your vehicle a serious performance boostPrecision engineered for your vehicle
      $212.50from $170.00 - $300.00
      # 15848165
    • DC Sports® Polished Stainless Steel Turbocharger Downpipe
      (0 reviews)
      Subaru WRX / WRX STI 2004, Polished Stainless Steel Turbocharger Downpipe by DC Sports®. DC Sports competition pipes delete the catalytic to eliminate restriction in the exhaust path and are dyno tuned to deliver incredible...
      $347.03$277.62
      # 45401510
    • Genuine® Exhaust Pipe
      (0 reviews)
      Subaru WRX 2004, Exhaust Pipe by Genuine®. Note: Connects the 2 Exhaust Manifolds. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for safety and legal...
      $430.70$344.56
      # 44711904
    • Spec-D® N1 Style Cat-Back Exhaust System (3" Inlet)
      (0 reviews)
      Subaru WRX 2004, N1 Style Cat-Back Exhaust System (3" Inlet) 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...
      Dramatically improved exhaust flow compared to restrictive stock systemImproved engine breathing enables increased power output for better performance
      $200.25$160.20
      # 38833104
    • Spec-D® N1 Style Cat-Back Exhaust System with Burnt Tip (3" Inlet)
      (0 reviews)
      Subaru WRX 2004, N1 Style Cat-Back Exhaust System with Burnt Tip (3" Inlet) 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...
      Dramatically improved exhaust flow compared to restrictive stock systemImproved engine breathing enables increased power output for better performance
      $200.25$160.20
      # 38833103
    • DEC® Catalytic Converter
      (0 reviews)
      Subaru WRX 2004, Catalytic Converter by DEC®. Position: Rear. 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...
      $402.76$322.21
      # 7642014
    • Agency Power® Manifold Temp Reducer Gaskets
      (0 reviews)
      Subaru WRX 2004, Manifold Temp Reducer Gaskets by Agency Power®. When switching from 4 lug to 5 lug hubs, the shock mounts for those wanting to use their existing shocks or coilovers will need spacers. These spacers fit in the...
      $50.00$40.00
      # 15847660
    • Genuine® Exhaust Gasket
      (0 reviews)
      Subaru WRX / WRX STI 2004, Exhaust Gasket by Genuine®. Note: Sealing Ring - Intermediate pipe to Main Catalyst. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off,...
      $39.25$31.40
      # 8922124
    • Fel-Pro® Exhaust Manifold Gasket Set
      (0 reviews)
      Subaru WRX / WRX STI 2004, Exhaust Manifold Gasket Set by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources,...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $13.55$10.84
      # 57246272
    • AJUSA® Exhaust Manifold Gasket
      (0 reviews)
      Subaru WRX 2.0L 2004, Exhaust Manifold Gasket by AJUSA®. These gaskets seal components in the intake and exhaust systems of the vehicle such as the intake manifold, intake plenum, and exhaust manifold to the engine or other...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $8.95$7.16
      # 23005818
    • Fel-Pro® Exhaust Pipe Flange Gasket
      (0 reviews)
      Subaru WRX 2004, Exhaust Pipe Flange Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $9.48from $7.58 - $17.13
      # 40720474
    • Victor Reinz® Exhaust Pipe Flange Gasket
      (0 reviews)
      Subaru WRX STI 2004, Exhaust Pipe Flange Gasket by Victor Reinz®, Use 1 per Car. Muffler to Tailpipe. OEM Standard. Material: Composite. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to...
      $11.75$9.40
      # 24042714
    • Beck Arnley® Exhaust Manifold Gasket
      (0 reviews)
      Subaru WRX / WRX STI 2004, Exhaust Manifold Gasket by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import...
      OE quality products from top original equipmentTop quality materials
      $16.41$13.13
      # 52265954
    • Eastern® Universal Fit Catalytic Converter
      (0 reviews)
      Subaru WRX STI 2004, Universal Fit Catalytic Converter by Eastern Catalytic®. Whether your catalytic converter is damaged by road debris or failed due to an engine problem, you definitely need a new one, and this product is the way...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $50.91from $40.73 - $49.41
      # 38848815
    • Flowmaster® 10 Series Delta Force Single Chamber Race Muffler
      (0 reviews)
      Universal 10 Series Delta Force Single Chamber Race Muffler by Flowmaster®, AGGRESSIVE SOUND. The 10 Series Race mufflers are a compact lightweight single chamber design that will give a noticeable sound reduction compared to open...
      Race Proven TechnologyNoticeable Sound Reduction Compared to Open Headers
      $94.53from $75.62 - $146.90
      # 898490
    • Flowmaster® 30 Series Delta Force™ 3-Chamber Race Muffler
      (0 reviews)
      Universal 30 Series Delta Force™ 3-Chamber Race Muffler by Flowmaster®, AGGRESSIVE SOUND. These are the most powerful and the quietest professional race mufflers available. 5.00” & 6.00” thick case sizes for maximum power and...
      Race Proven TechnologyDelta Force Technology for Maximum Torque and Power
      $160.31from $128.25 - $267.60
      # 898450
    • Flowmaster® 40 Series Delta Force™ 2-Chamber Race Muffler
      (0 reviews)
      Universal 40 Series Delta Force™ 2-Chamber Race Muffler by Flowmaster®, AGGRESSIVE SOUND. The 40-Series mufflers offer a combination of maximum power and substantial dB-reduction compared to open headers. They are recommended for...
      Race Proven TechnologyDelta Force Technology for Maximum Torque and Power
      $132.48from $105.98 - $230.86
      # 898479
    • Flowmaster® 60 Series Delta Force Stainless Steel Race Muffler
      (0 reviews)
      Universal 60 Series Delta Force Stainless Steel Race Muffler by Flowmaster®, MODERATE SOUND, 4" Offset Inlet / 4" Offset Outlet, 22" Length. These are the most powerful and the quietest professional race mufflers available.
      Race Proven TechnologyNoticeable Sound Reduction Compared to Open Headers
      $246.58$197.26
      # 3146020
    • Flowmaster® Outlaw™ Race Muffler
      (1 reviews)
      Universal Outlaw™ Race Muffler by Flowmaster®, AGGRESSIVE SOUND. These mufflers are very small and lightweight. Attached directly to the collector they generally produce more power than open headers, while taking “the edge”...
      Race Proven TechnologyPure Race Muffler
      $111.25from $89.00 - $134.32
      # 898456
    • Flowmaster® Pro Series™ Stainless Steel Race Muffler with Turn Down
      (1 reviews)
      Universal Pro Series™ Stainless Steel Race Muffler with Turn Down by Flowmaster®, MODERATE SOUND, 6" Diameter x 16" Case Length. Laminar Flow Mufflers have applications in all forms of racing. The Cool Shell Technology makes...
      Race Proven Patented Laminar Flow TechnologyProven to Reduce dB Levels with no Reduction of Engine Performance Level
      $236.09$188.87
      # 898465
    • Flowmaster® Scavenger Series Outlaw II Race Collector Muffler
      (0 reviews)
      Universal Scavenger Series Outlaw II Race Collector Muffler by Flowmaster®. These Delta Force Mufflers are designed to attach directly to the exhaust header primary tubes, replacing the collector in sprint and drag racing...
      Race Proven TechnologyAttach to Exhaust Header Primary Tubes
      $234.83from $187.86 - $208.84
      # 23297627
    • Flowmaster® Scavenger Series Race Collector Muffler
      (0 reviews)
      Universal Scavenger Series Race Collector Muffler by Flowmaster®. These Delta Force Mufflers are designed to attach directly to the exhaust header primary tubes, replacing the collector in sprint and drag racing applications. They...
      Race Proven TechnologyAttach to Exhaust Header Primary Tubes
      $209.43$167.54
      # 898468
    • Flowmaster® 40 Series Delta Flow™ Muffler
      (1 reviews)
      Universal 40 Series Delta Flow™ 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 Flowmaster Delta Flow...
      The Quietest Option in the 40 Series Two Chamber LineLess Resonance than other 40 Series Mufflers
      $108.85from $87.08 - $108.08
      # 897054
    • Flowmaster® 40 Series Original Muffler
      (0 reviews)
      Universal 40 Series Original Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. This is the muffler that launched the success of Flowmaster. It is an aggressive sounding...
      The Original High Performance Flowmaster MufflerrAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $108.85$87.08
      # 897079
    • Flowmaster® 50 Series Delta Flow™ Muffler
      (0 reviews)
      Universal 50 Series Delta Flow™ Muffler by Flowmaster®, MODERATE SOUND, 4" Thick x 9.75" Wide x 17" Case Length x 23" Overall Length. The 50 Series Delta Flow mufflers are designed for passenger cars. The sound characteristics...
      Three Chamber Delta Flow TechnologyFully MIG-Welded for Maximum Durability
      $133.78from $107.02 - $120.66
      # 897086
    • Flowmaster® 50 Series Delta Flow™ Slimline Muffler
      (0 reviews)
      Universal 50 Series Delta Flow™ Slimline Muffler by Flowmaster®, MODERATE SOUND. The 50 Series Delta Flow Slimline mufflers are designed for passenger cars. The sound characteristics are moderate exterior sound level and minimal...
      Three Chamber Delta Flow TechnologyFully MIG-Welded for Maximum Durability
      $168.74from $134.99 - $139.56
      # 897156
    • Flowmaster® 60 Series Delta Flow™ Muffler
      (0 reviews)
      Universal 60 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, MILD SOUND, 2.25" Center Inlet / 2.25" Center Outlet, 5" Thick x 10" Wide x 13" Case Length x 19" Overall Length. The 60 Series increases horsepower and...
      A Favorite With Import and Sport Compact OwnersBest When Matched for Four and Six Cylinder Engines
      $163.98$131.18
      # 897052
    • Flowmaster® 70 Series Delta Flow™ Big Block Muffler
      (0 reviews)
      Universal 70 Series Delta Flow™ Big Block Muffler by Flowmaster®, MILD SOUND, 5" Thick x 10" Wide x 22" Case Length x 28" Overall Length. The 70 Series Big Block II Muffler uses a longer case for increased volume and added...
      Quiet Muffler for Trucks and Big Power EnginesThree-Chamber Delta Flow Technology
      $190.19$152.15
      # 897109
    • Flowmaster® Pro Series™ Laminar Flow Muffler
      (0 reviews)
      Universal Pro Series™ Laminar Flow Muffler by Flowmaster®, MODERATE SOUND. PRO Laminar Flow mufflers have a patented core design that is characterized by efficient exhaust scavenging and minimized drone. They produce a rich, deep...
      The Most Versatile Laminar Flow Technology Muffler OfferedAvailable in Full Size and Shorty Versions
      $183.63from $146.90 - $205.66
      # 897161
    • Flowmaster® Super 10 Series Delta Flow™ Stainless Steel Muffler
      (5 reviews)
      Universal Super 10 Series Delta Flow™ Stainless Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 5.50" Case Length x 12.50" Overall Length. If you want to be arrested, you should mount this muffler on your...
      The Most Aggressive Muffler Offered by FlowmasterRecommended for Racing Applications Only
      $87.49from $69.99 - $73.44
      # 897126
    • Flowmaster® Super 40 Series Delta Flow™ Muffler
      (0 reviews)
      Universal Super 40 Series Delta Flow™ Muffler by Flowmaster®, AGGRESSIVE SOUND, 5" Thick x 10" Wide x 13.50" Case Length x 19.50" Overall Length. The Super 40 Series Delta Flow Mufflers are developed from the Top Ten muffler...
      Can Replace Any Other 40-Series MufflerDeeper and Richer Tone than Original 40 Series Muffler
      $131.15from $104.92 - $109.49
      # 897132
    • Flowmaster® Super 44 Series Delta Flow™ Muffler
      (5 reviews)
      Universal Super 44 Series Delta Flow™ Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The Super 44 has the deepest, richest, most aggressive muscle tone of all 4” street...
      Deep, Aggressive, High Performance Exhaust NoteTwo-Chamber Design for Power and Torque Increase
      $104.88from $83.90 - $94.44
      # 897136
    • Flowmaster® Super HP-2™ Stainless Steel Performance Muffler
      (0 reviews)
      Universal Super HP-2™ Stainless Steel Performance Muffler by Flowmaster®, 4" Thick x 5" Wide. The new Super HP-2 Series muffler offers the same great performance benefits and moderate tone that you would expect from our laminar...
      Moderate tone - perfect for performance and passenger cars409S Stainless Steel version backed by lifetime warranty
      $137.73from $110.18 - $178.38
      # 15943155
    • Flowmaster® Resonator
      (0 reviews)
      Universal Resonator by Flowmaster®. The resonators are designed for use in conjunction with Flowmaster Mufflers for improved sound reduction and minimize interior resonance.
      Reduce Interior ResonanceWork with Flowmaster Mufflers
      $99.60from $79.68 - $124.88
      # 898502
    • Borla® S-Type™ Stainless Steel Round Muffler
      (13 reviews)
      Universal S-Type™ Stainless Steel Round Muffler by Borla®. Get increased performance and the aggressive sound of power with this Universal S-Type Muffler. This is the same style austenitic stainless steel straight through muffler...
      Increased exhaust flow for better performanceDefinite performance tone at cruise with a throaty, aggressive sound during acceleration
      $219.99$175.99
      # 25728287
    • Borla® XR-1™ Multicore Stainless Steel Race Muffler
      (1 reviews)
      Universal XR-1™ Multicore Stainless Steel Race Muffler by Borla®. The Borla XR-1 Multi-Core Muffler was developed on the race track to quiet the most severe engine noise without restricting power. They work so well that they're...
      The most possible exhaust flow in a muffler for maximum performanceQuiets the most severe engine noise, leaving a pronounced sound of power
      $306.24from $244.99 - $469.99
      # 959705
    • Borla® Heavy Duty Stainless Steel Round Muffler
      (1 reviews)
      Universal Heavy Duty Stainless Steel Round Muffler by Borla®, 3" Center Inlet / 3" Center Outlet. Get increased performance and the aggressive sound of power with this Heavy Duty Stainless Steel Round Muffler. This muffler includes...
      Increased exhaust flow for better performanceDefinite performance tone at cruise with a throaty, aggressive sound during acceleration
      $262.49$209.99
      # 25728296



    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.
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    2004 Subaru WRX Performance Exhaust Systems Reviews
    Average rating: 5 5 - 1 reviews
    (5)
    APPEARANCE
    EASE OF INSTALLATION
    PRICE/VALUE
    QUALITY
    2003 Subaru WRX | Posted by William | (Abiquiu, NM)

    Overall wonderful experience. From ordering the system to delivery and installation. And the sound is just right. Would highly recommend ordering this product from this company!

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    2004 Subaru WRX Models
    • 2004 Subaru Impreza WRX Performance Exhaust Systems
    • 2004 Subaru Impreza WRX STI Performance Exhaust Systems