2004 Subaru WRX Performance Exhaust Systems

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    • (0 reviews)
      # 86041468
      Subaru WRX STI 2.5L 2004, S-Type™ Stainless Steel Cat-Back Exhaust System by Borla®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". System Sound: Aggressive. When you want the best...
      Aggressive Plus SoundIncreased exhaust flow for better performance
      $689.99
    • (0 reviews)
      # mpn469959430
      Subaru WRX with GDB Chassis 2004, Super Turbo Series™ 304 SS Exhaust System by HKS®. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Professionally developed with a racer in mind, this HKS exhaust system provides an...
      Effective on stock to high performance vehicles w/ upgraded turbines.The performance exhaust sound meets the JASMA standard
      $909.92
    • (0 reviews)
      # 381435588
      Subaru WRX / WRX STI 2004, Street Series™ Stainless Steel Cat-Back Exhaust System by MagnaFlow®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. System Sound: Moderate. The Street Series is designed for...
      Moderate SoundDelivers More Horsepower
      $641.28 - $641.32
    • (0 reviews)
      # mpn1979424
      Subaru WRX 2004, N-II™ 304 SS Cat-Back Exhaust System by ARK Performance®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". The ARK N-II cat-back exhaust system offers straight-through...
      All Bolt-on SystemStraight-through Muffler Core
      $1,112.65
    • (0 reviews)
      # 97200612
      Subaru WRX 2004, Sport Series™ 409 SS Exhaust System by HKS®. Exhaust Tubing Material: 409 SS. Main Tubing Diameter: 3". Professionally developed with a racer in mind, this HKS exhaust system provides an easy opportunity to...
      Upgrades both the horsepower and sound of your vehicleMade from premium quality materials
      $497.09
    • (0 reviews)
      # 81935442
      Subaru WRX 2004, N1™ Stainless Steel Cat-Back Exhaust System by Invidia®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". For a good balance of price and performance, Invidia offers the...
      Made to boost the performance of your vehicleExpertly crafted from premium materials
      $617.40
    • (0 reviews)
      # 50386767
      Subaru WRX 2004, Touring™ Stainless Steel Cat-Back Exhaust System by Borla®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". System Sound: Mild Tone. When you want the best performing,...
      Increases horsepower and torqueIncreased Exhaust Flow for Better Performance
      $709.99
    • (0 reviews)
      # 95333325
      Subaru WRX 2004, G200™ Stainless Steel Cat-Back Exhaust System by Invidia®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". If performance is what you are seeking, the Invidia G200...
      Features a super-strength titanium tipMade to boost the performance of your vehicle
      $679.70
    • (0 reviews)
      # 81935445
      Subaru WRX 2004, N1™ Stainless Steel Racing Cat-Back Exhaust System by Invidia®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". For a good balance of price and performance, Invidia...
      Made to boost the performance of your vehicleExpertly crafted from premium materials
      $540.40
    • (0 reviews)
      # 95333327
      Subaru WRX 2004, Q300™ Stainless Steel Cat-Back Exhaust System by Invidia®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". The flat bottom shaped muffler design results in improved...
      SUS304 polished stainless steel pipingMandrel bent to shape
      $648.20
    • (0 reviews)
      # mpn469959454
      Subaru WRX / WRX STI 2004, Carbon-Ti Series™ 304 SS Cat-Back Exhaust System by HKS®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Professionally developed with a racer in mind, this HKS...
      Upgrades both the horsepower and sound of your vehicleMade from premium quality materials
      $723.72
    • (0 reviews)
      # mpn469959449
      Subaru WRX / WRX STI 2004, Hi-Power Series™ 304 SS Cat-Back Exhaust System by HKS®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Professionally developed with a racer in mind, this HKS...
      Upgrades both the horsepower and sound of your vehicleMade from premium quality materials
      $462.54
    • (0 reviews)
      # 70195854
      Subaru WRX 2004, Legamax Series™ 304 SS Exhaust System by HKS®. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Professionally developed with a racer in mind, this HKS exhaust system provides an easy opportunity to...
      Upgrades both the horsepower and sound of your vehicleMade from premium quality materials
      $610.83
    • (0 reviews)
      # mpn2564309
      Subaru WRX STI 2004, Cat-Back Exhaust System by Agency Power®. Exhaust Type: Cat-Back. The Cat-Back is designed for customers seeking increased performance and better economy, combined with a powerful and well tuned exhaust note,...
      Suitable for Everyday DrivingIncreases Power
      $800.00
    • (0 reviews)
      # mpn2321857
      Subaru WRX / WRX STI 2004, Single Canister™ 304 SS Cat-Back Exhaust System by DC Sports®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". DC Sports exhaust systems are CNC Mandrel bent from T304...
      Individually tuned and dyno-tested for maximum performanceUses factory mounting locations for ease of installation and solid hangers for added durability
      $517.27
    • (0 reviews)
      # 381435615
      Subaru WRX 2004, N1 Style™ 304 SS Cat-Back Exhaust System by Spec-D®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Make whatever you drive run and sound like a high-performance machine with a...
      Made of high quality T-304 stainless steelMaximum performance which increases up to 15 horsepower
      $154.33 - $163.40
    • (0 reviews)
      # mpn470412087
      Subaru WRX Wagon 2004, N1 Evo-R™ 304 SS Single Cat-Back Exhaust System by APEXi®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". System Sound: Deep Tone. The N1 series muffler has become a...
      Ideal for the daily driver car of an enthusiastMade from high-quality materials
      $564.68
    • (0 reviews)
      # 93989272
      Subaru WRX 2004, NOIR™ Mild Steel Cat-Back Exhaust System by APEXi®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Mild Steel. Main Tubing Diameter: 3". The NOIR Muffler was developed specifically with the diehard street car...
      Muffler is based on the "Original" WS (World Sport) Muffler Canister and TipFinished with an ALL Matte-Black Color Powdercoat from Piping - to - Tip
      $610.88
    • (0 reviews)
      # 132243424
      Subaru WRX 2004, WS2 Mild Steel Single Cat-Back Exhaust System by APEXi®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Mild Steel. Main Tubing Diameter: 2.5". The WS Exhaust series is the A'PEX answer to the ultimate street...
      Designed to boost your vehicle's performanceProvides excellent low and mid range power without excessive noise
      $650.01
    • (0 reviews)
      # 62402478
      Subaru WRX 2004, Stainless Steel Cat-Back Exhaust System by AVO®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". This AVO product is just the option for you in case you want to get the...
      Designed to boost your vehicle's performanceMade from high-quality materials
      $818.00
    • (0 reviews)
      # 84938467
      Subaru WRX 2004, 304 SS Cat-Back Exhaust System by PERRIN Performance®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". PERRIN Performance mufflers have a true 3" internal diameter for...
      Straight-through muffler for uninterrupted exhaust flow4" slash cut exhaust tip adds an aggressive look
      $607.50
    • (0 reviews)
      # mpn458196762
      Subaru WRX / WRX STI Sedan 2004, Medalion Touring™ Stainless Steel Cat-Back Exhaust System by Tanabe®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3.15". The elegant, well defined...
      Designed to boost your vehicle’s performanceEngineered to excel in quality and durability
      $693.50
    • (0 reviews)
      # mpn470567115
      Subaru WRX 2004, Pro Spec™ Stainless Steel Cat-Back Exhaust System by Buddy Club®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". Based off the same racing proven technologies as the...
      Designed to help your auto operate at its peakMade to provide improved exhaust flow
      $700.00
    • (0 reviews)
      # mpn470567161
      Subaru WRX 2004, Spec III™ Stainless Steel Cat-Back Exhaust System by Buddy Club®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.91". Buddyclub Spec III true RACING SPEC MUFFLER is a...
      Designed to help your auto operate at its peakMade to provide improved exhaust flow
      $665.10
    • (0 reviews)
      # mpn1156302
      Subaru WRX / WRX STI 2004, OEM Grade Front Stainless Steel Exhaust Manifold with Integrated Catalytic Converter by MagnaFlow®. Location: Front. Primary Tubing Diameter: 2.5". Collector Outlet Diameter: 2.5". Emissions: EPA...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $583.50
    • (0 reviews)
      # 332947431
      Subaru WRX 2004, Stainless Steel Exhaust Header by Borla®. Emissions: EPA compliant. Primary Tubing Diameter: 1.63". Collector Outlet Diameter: 2.25". Color: Silver. Header Coating: Uncoated. Header Style: Long Tube. 304 stainless...
      Austenitic 304 stainless steel tubing means a lifetime product that won't ever corrode or deteriorateAll bends are mandrel-bent for smooth transitions and maximum flow characteristics
      $659.99
    • (0 reviews)
      # mpn457857379
      Subaru WRX STI 2.5L 2004, Stainless Steel Exhaust Header by Invidia®. Do you want to get more power out of your vehicle? Then this superior Invidia product is just for you. Carefully designed for maximum performance, is will more...
      Made to boost the performance of your vehicleExpertly crafted from premium materials
      $1,083.60
    • (0 reviews)
      # mpn457857380
      Subaru WRX STI 2.5L 2004, Stainless Steel Exhaust Manifold by Invidia®. Do you want to get more power out of your vehicle? Then this superior Invidia product is just for you. Carefully designed for maximum performance, is will more...
      Made to boost the performance of your vehicleExpertly crafted from premium materials
      $927.50
    • (0 reviews)
      # mpn469958441
      Subaru WRX STI Except US Models with GDB Chassis 2.0L 2004, 304 SS Turbo Exhaust Manifold by HKS®. You can have the great performance and great muffler sound of the isometric layout by changing exhaust manifold only with the stock...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $835.54
    • (0 reviews)
      # 447978371
      Subaru WRX STI 2004, Exhaust 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
      $600.00 - $700.00
    • (0 reviews)
      # mpn2268380051
      Subaru WRX / WRX STI 2004, 304 SS Turbo Exhaust Manifold by DC Sports®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2". Color: Silver. Header Coating: Uncoated. DC Sports Turbo Manifolds are the perfect upgrade for...
      Gives your vehicle a serious performance boostPrecision engineered for your vehicle
      $437.99
    • (1 review)
      # mpn865727086
      Subaru WRX 2004, Stainless Steel Exhaust Header by Spec-D®. Emissions: EPA compliant. Collector Outlet Diameter: 2.33". Color: Silver. Header Coating: Uncoated. Header Style: Long Tube. Make whatever you drive run and sound like a...
      Increase up to 12-15 hp1.5" primary tune / 2.5" collector
      $154.33
    • (0 reviews)
      # 231140189
      Subaru WRX / WRX STI 2004, EL 4-1 Performance Holy Exhaust Header by Killer B Motorsport®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $1,249.00 - $1,905.00
    • (0 reviews)
      # 84938475
      Subaru WRX / WRX STI 2004, Equal Length Exhaust Header by PERRIN Performance®. Emissions: EPA compliant. Color: Gray. Header Coating: Uncoated.
      $972.00 - $981.00
    • (0 reviews)
      # 380887193
      Subaru WRX STI 2.5L 2004, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Without Air Tube. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". If your car...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $320.31 - $485.43
    • (0 reviews)
      # 317064248
      Subaru WRX 2004, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter:...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $100.27 - $105.95
    • (0 reviews)
      # 317064255
      Subaru WRX / WRX STI With LEV Specification / With LEV1 Specification 2.0L 2004, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval....
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $179.02 - $185.78
    • (0 reviews)
      # mpn1156305
      Subaru WRX STI 2.5L 2004, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Rear. Without Air Tube. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter:...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $398.76
    • (0 reviews)
      # 317064258
      Subaru WRX 2004, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter:...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $119.49 - $122.43
    • (0 reviews)
      # 81935433
      Subaru WRX 2004, 304 SS Bellmouth Non-Catted Downpipe by Invidia®. Material: 304 SS. Main Piping Diameter: 2.99" (76 mm). Do you want to get more power out of your vehicle? Then this superior Invidia product is just for you....
      Made to boost the performance of your vehicleExpertly crafted from premium materials
      $278.60 - $294.00
    • (0 reviews)
      # 81935436
      Subaru WRX 2004, Stainless Steel Downpipe by Invidia®. Material: Stainless Steel. Main Piping Diameter: 2.99" (76 mm). Do you want to get more power out of your vehicle? Then this superior Invidia product is just for you. Carefully...
      Made to boost the performance of your vehicleExpertly crafted from premium materials
      $308.70 - $540.40
    • (0 reviews)
      # 70195873
      Subaru WRX 2004, Off-Road Downpipe by HKS®. Reduction of secondary exhaust gas back pressure will improve response of turbocharger. EJ engines' common problem of knocking due to high exhaust gas pressure can be solved. Thus, it is...
      Provides the passageway for exhaust gas which originates at the cylinder head and exits at the tail pipeMade from premium quality materials
      $134.80 - $336.16
    • (0 reviews)
      # mpn469959706
      Subaru WRX / WRX STI 2004, Stainless Steel Polished Up Pipe by HKS®. Material: Stainless Steel. Main Piping Diameter: 1.77". This product is made from materials of the highest possible quality to ensure exceptional durability to...
      Provides the passageway for exhaust gas which originates at the cylinder head and exits at the tail pipeMade from premium quality materials
      $168.50
    • (0 reviews)
      # 379193
      Subaru WRX 2004, Downpipe by Injen®. Eliminate restriction and maximize exhaust flow with this quality stainless steel downpipe.
      $374.21 - $544.74
    • (0 reviews)
      # mpn2564548
      Subaru WRX STI 2004, 304 SS Up Pipe by Agency Power®. Material: 304 SS. 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...
      Gives your vehicle a serious performance boostPrecision engineered for your vehicle
      $170.00
    • (0 reviews)
      # mpn2564461
      Subaru WRX STI 2004, Racing 304 SS Downpipe by Agency Power®. Material: 304 SS. When adding an Agency Power Racing Downpipe to your turbo car, you will gain more horsepower and overall performance. The downpipe allows for better...
      Gives your vehicle a serious performance boostPrecision engineered for your vehicle
      $300.00
    • (0 reviews)
      # mpn2831856645
      Subaru WRX / WRX STI 2004, Racing Stainless Steel Downpipe by Spec-D®. Material: Stainless Steel. Includes: O2 Sensor Insertion, Hardware, Bolts, Screw and Gasket. Increase Up To 10-15 Horsepower. Make whatever you drive run and...
      Dramatically improved exhaust flow compared to restrictive stock systemImproved engine breathing enables increased power output for better performance
      $114.38
    • (0 reviews)
      # mpn461609547
      Subaru WRX STI 2.5L 2004, Rotated Turbo Downpipe by PERRIN Performance®. Designed utilizing the latest technology, this product by PERRIN features premium quality and will perform better than advertised. Perfect for your vehicle...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $585.00
    • (0 reviews)
      # mpn461609549
      Subaru WRX STI 2.5L 2004, Rotated Turbo Downpipe and Up Pipe Kit by PERRIN Performance®. Designed utilizing the latest technology, this product by PERRIN features premium quality and will perform better than advertised. Perfect for...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $918.00
    • (0 reviews)
      # mpn461609546
      Subaru WRX STI 2.5L 2004, Rotated Turbo Up Pipe by PERRIN Performance®. Designed utilizing the latest technology, this product by PERRIN features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $342.00
    • (0 reviews)
      # 82571317
      Subaru WRX 2004, Up Pipe by PERRIN Performance®. PERRIN has been known since inception for the quality of Up-Pipe. The Up-Pipe was the first product Perrin ever released and has been a leader in this market ever since. Up-Pipe is...
      CNC mandrel bent and precision welded stainless steel tubingSnugly fits the OEM exhaust manifold outlet and OEM turbo inlet
      $148.50 - $236.70
    • (0 reviews)
      # mpn458196728
      Subaru WRX / WRX STI 2004, 304 SS Downpipe by Tanabe®. Material: 304 SS. Main Piping Diameter: 3.15". Upgrading the Turbine Tube, also known as the downpipe will have the greatest impact on turbocharged vehicles. Turbo efficiency,...
      Designed to boost your vehicle’s performanceEngineered to excel in quality and durability
      $370.50
    • (0 reviews)
      # 84938480
      Subaru WRX 2004, 15mm Polyurethane Exhaust Hanger by PERRIN Performance®. When new, OEM rubber exhaust hangers are fine for the stock exhaust system. But they simply don't hold up or perform well in performance applications. Over...
      Help keep your exhaust system securely placedMade from polyurethane that is resistant to high and low temperatures
      $11.03
    • (0 reviews)
      # mpn470412097
      Subaru WRX / WRX STI 2004, Rubber Muffler Hangers by APEXi®. Includes: 2 pieces. A'PEXi muffler hangers are constructed of an Ethylene Propylene Rubber (EPM) material which is resilient against heat, aging, and wear and tear. The...
      Ideal for the daily driver car of an enthusiastMade from high-quality materials
      $18.18
    • (0 reviews)
      # mpn458193544
      Subaru WRX / WRX STI 2004, Exhaust Mount by Torque Solution®. Torque Solution® exhaust mounts will reduce exhaust movement and vibrations both under extreme racing conditions and daily street driving. Great compliment to any...
      Eliminates Exhaust MovementMade from High Grade Polyurethane
      $39.84
    • (0 reviews)
      # mpn461609134
      Subaru WRX STI 2.5L 2004, Downpipe Thermal Blanket by PERRIN Performance®. PERRIN Thermal Blankets will improve response while lowering under hood temperatures. Thermal losses from headers, uppipes, turbine housings, and downpipes,...
      Improves power while lowering under hood temperaturesEnsures a precise fit to protect under hood components from heat
      $185.40
    • (0 reviews)
      # 427377499
      Subaru WRX STI 2004, Exhaust Hanger by Kartboy®. 15mm is diameter of the center holes. Material: Polyurethane. Black polyurethane exhaust hanger from Kartboy provides an easy way to stop your exhaust system from moving and bumping....
      Designed to help you get the maximum out of your ridePerfect solution for hardcore racers and rookies alike
      $8.00 - $9.00
    • (0 reviews)
      # mpn458181552
      Subaru WRX / WRX STI 2004, MLS Exhaust Header Gasket by Cometic Gasket®.
      Made of High Quality MaterialsBuilt to Last
      $33.03
    • (0 reviews)
      # 116543160
      Subaru WRX 2004, Exhaust Manifold Gasket Set by Magnum Gasket®. You'd better be ready to take the heat if you're going to seal an exhaust manifold, where temperatures can often exceed 1,000°F. You can count on Magnum to offer the...
      Made of High Quality MaterialsThe best combination of steel layers and high-temp gasket materials
      $9.14
    • (0 reviews)
      # 114818237
      Subaru WRX 2004, Replacement Exhaust Kit by Walker®. If you are looking for the ultimate in quality and value, then this superior replacement exhaust kit by Walker is what you need. All its components are designed with precision...
      Direct fit replacementIncludes all applicable flanges, hangers, and sensor fittings
      $69.64 - $248.60




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    2004 Subaru WRX Performance Exhaust Systems Reviews

    Average rating:  4.5  4.5 - 2 reviews
    4.5 of 5
    Header
    The header is really nice, it has really nice welds on it compared to just cheap eBay header. It has a adjustable length on it to let you expand it by maybe an inch if you need just in case its a tight fit. Overall I love this header for the price and quality. Thanks CARiD!
    CPosted by Collin (Poughkeepsie, NY) / February 22, 2017
    2003 Subaru WRX
    Was this review helpful for you? Yes
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