2004 Subaru WRX Performance Engine Parts

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    • PERRIN Performance® Rotated Turbo Installation Kit
      (0 reviews)
      # 74053125
      Subaru WRX 2004, Rotated Turbo Installation Kit by PERRIN Performance®. Each Kit includes Intake system, 3" downpipe, boost tube connection for Front Mounted Intercooler, and all other parts needed for installation for those who...
      Designed to provide more horsepowerRotated turbo allows to attach to almost every aftermarket front mount intercooler
      $1,881.00
    • HKS® GT II Sports Turbo Kit
      (0 reviews)
      # 70193962
      Subaru WRX STI 2004, GT II Sports Turbo Kit by HKS®. Boost Pressure: 78.5 - 98.1 kPa (0.8 - 1.0 kgf/cm2). Component: GT II 7460 (49T A/R 0.67) Turbine, Upgraded Actuator, Oil Piping, Water Piping, Gaskets/Short Parts. Designed...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $2,358.72
    • HKS® GT Sport Turbo Kit
      (0 reviews)
      # 70195877
      Subaru WRX 2004, GT Sport Turbo Upgrade by HKS®. Boost Pressure: 88.3 kPa (0.9 kgf/cm2). Turbo Size: GT2835 (56T). These kits consist of new, larger HKS GT turbos designed to bolt directly on to the stock manifold(s). Designed...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3,319.68
    • HKS® Super SQV4 Blowoff Valve Kit
      (0 reviews)
      # 97200614
      Subaru WRX 2004, Super SQV4 Blowoff Valve Kit by HKS®. HKS Super SQV (Sequential Blow Off Valve) uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $326.27
    • Brian Crower® Camshaft
      (0 reviews)
      # 98906778
      Subaru WRX 2004, Camshaft by Brian Crower®. BC high performance camshafts are ground on state-of-the-art CNC cam grinders to insure accuracy and tolerances to within .02mm. Every BC camshaft profile has been prototyped and dyno...
      $686.80 - $766.04
    • GSC Power-Division® S1 Camshafts
      (0 reviews)
      # 62402202
      Subaru WRX 2004, S1 Camshafts by GSC Power-Division®.
      $849.15 - $934.15
    • Brian Crower® Crankshaft
      (0 reviews)
      # 98906785
      Subaru WRX 2004, Crankshaft by Brian Crower®. BC crankshafts are made from the finest, aerospace grade 4340 steel billet material. CNC machined on state of the art, 5 axis Mazak Integrex 300-IV CNC machines to exacting tolerances...
      $1,957.39
    • Brian Crower® Stroker Kit
      (0 reviews)
      # 98906803
      Subaru WRX 2004, Stroker Kit by Brian Crower®. Crankshafts: BC crankshafts are made from the finest, aerospace grade 4340 steel billet material. CNC machined on state of the art, 5 axis Mazak Integrex 300-IV CNC machines to...
      $2,969.34 - $3,380.18
    • CP-Carrillo® Pro-A Style Taper Blade Connecting Rod
      (0 reviews)
      # 73705533
      Subaru WRX STI 2004, Pro-A Style Taper Blade Connecting Rod by CP-Carrillo®. CC: 5.137" (130.5mm). Bolt Size: 3/8". Bolt Type: WMC. PE Width: 0.845" (21.46mm). BE Width: 0.844" (21.44mm). BE Bore: 2.1653" (55mm). Pin Size: 23mm....
      Made from high-grade materialsProvides efficient performance
      $294.00
    • CP-Carrillo® Pro-H Style Connecting Rod
      (0 reviews)
      # 73710159
      Subaru WRX STI 2004, Pro-H Style Connecting Rod by CP-Carrillo®. CC: 5.137" (130.5mm). Bolt Size: 3/8". PE Width: 0.845" (21.46mm). BE Width: 0.844" (21.44mm). BE Bore: 2.1653" (55mm). Pin Size: 23mm. Lead the way with strong Pro-H...
      Made from high-grade materialsProvides efficient performance
      $294.00 - $344.40
    • CP-Carrillo® Pro-SA Style Taper Blade Connecting Rod
      (0 reviews)
      # 73705532
      Subaru WRX STI 2004, Pro-SA Style Taper Blade Connecting Rod by CP-Carrillo®. CC: 5.137" (130.5mm). Bolt Size: 3/8". Bolt Type: WMC. PE Width: 0.845" (21.46mm). BE Width: 0.844" (21.44mm). BE Bore: 2.1653" (55mm). Pin Size: 23mm....
      Made from high-grade materialsProvides efficient performance
      $294.00
    • Brian Crower® BC625+ Connecting Rods
      (0 reviews)
      # 98991912
      Subaru WRX 2004, BC625+ Connecting Rods by Brian Crower®. Set of Four. Bc625+ With Arp Custom Age 625+ Fasteners (Subaru Ej205/Ej257). Rod Length: 5.141". The BC625+ rod from BC is the premier industry connecting rod. Incorporating...
      $685.08
    • Brian Crower® I-Beam Connecting Rods
      (0 reviews)
      # 98991916
      Subaru WRX 2004, I-Beam Connecting Rods by Brian Crower®. Set of Four. I Beam With Arp2000 Fasteners (Subaru Ej205/Ej257). Rod Length: 5.141". BC offers an I-Beam style connecting rod for those who prefer that traditional design...
      $695.21
    • Brian Crower® I Beam Extreme Connecting Rods
      (0 reviews)
      # 98991914
      Subaru WRX 2004, I Beam Extreme Connecting Rods by Brian Crower®. Set of Four. I Beam Extreme With Arp Custom Age 625+ (Subaru Ej205/Ej257). Rod Length: 5.141". BC offers an I-Beam style connecting rod for those who prefer that...
      $891.51
    • Brian Crower® Piston Set
      (0 reviews)
      # 98906796
      Subaru WRX 2004, Piston Set by Brian Crower®. Choose from the top piston brands available, CP or JE, in any desired bore size and compression ratio. Both brands make their custom BC stroker pistons from 2618 T6 high tensile...
      $789.20
    • Brian Crower® Sportsman Connecting Rods
      (0 reviews)
      # 98991918
      Subaru WRX 2004, Sportsman Connecting Rods by Brian Crower®. Set of Four. Sportsman With Arp2000 Fasteners (Subaru Ej205/Ej257). Rod Length: 5.141". Although the name implies that the Sportsman is a 2nd tier part, the Sportsman...
      $437.41
    • K1 Technologies® Sport Compact H-Beam Connecting Rods
      (0 reviews)
      # 102147504
      Subaru WRX 2004, Sport Compact H-Beam Connecting Rods by K1 Technologies®. K1 Technologies connecting rods offer world-class performance at an affordable price. Their race-ready connecting rods are made from 4340 forged steel, use...
      $365.21
    • Brian Crower® Adjustable Camshaft Gears
      (0 reviews)
      # 100754319
      Subaru WRX 2004, Adjustable Camshaft Gears by Brian Crower®. Set/4. With Arp Fastener Bolts. (Subaru Ej205 - WRX/Ej257 - Sti). BC gears are CNC machined from aerospace grade, 6061-T6 billet aluminum for ultimate tensile strength....
      $626.35
    • K&N® Premium Wrench-Off Oil Filter
      (0 reviews)
      # 337775
      Subaru WRX / WRX STI 2.0L 2004, Premium Wrench-Off Oil Filter by K&N®. Never wrestle with a stuck oil filter again. The Wrench-Off Canister Oil Filter can be easily removed with a socket or wrench.
      $12.44
    • K&N® Pro Series Premium Oil Filter
      (1 reviews)
      # 339877
      Subaru WRX / WRX STI 2004, Pro Series Premium Oil Filter by K&N®. This oil filter provides superior oil flow with less filter restriction. It’s compatible with synthetic and conventional motor oils.
      $7.40
    • aFe® Pro-Guard D2 Oil Filter
      (0 reviews)
      # 78883372
      Subaru WRX / WRX STI 2004, Pro-Guard D2 Oil Filter by aFe®. aFe created the Pro Guard D2 Oil Filter to handle the extreme conditions typically encountered by a heavy-duty diesel truck. Inside it has a synthetic composite material...
      $14.95
    • GReddy® Sports Oil Filter
      (0 reviews)
      # 62402200
      Subaru WRX 2004, Sports Oil Filter by GReddy®. QX-04. Size (L/H): 68mm / 65mm. Thread: M20xP1.5. GReddy Sports OX Oil Filters use “double pleats” folding technology on the inner filter to provide a maximum filtration surface...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and racing lifestyle
      $15.20
    • Killer B Motorsport® EJ Series High Performance Oil Pan
      (0 reviews)
      # 99035789
      Subaru WRX / WRX STI 2004, EJ Series High Performance Oil Pan by Killer B Motorsport®. Our V2 Performance Oil pan is designed to reliably meet the demands of high performance Subaru Engines used on street or track applications....
      $508.00
    • Moroso® Oil Pump Pickup
      (0 reviews)
      # 86275010
      Subaru WRX / WRX STI 2004, Oil Pump Pickup by Moroso®. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso part is specifically engineered to make your...
      $113.18
    • Agency Power® Lightweight Crank Pulley
      (0 reviews)
      # 15848391
      Subaru WRX STI 2004, Lightweight Crank Pulley by Agency Power®. Lightweight crank pulleys have proven horsepower and torque increases time after time. Agency Power chooses to make all of the crank pulleys the same diameter as the...
      Horsepower and torque increasesMade of CNC machined 6061 aluminum
      $130.00
    • Go Fast Bits® Non-Underdrive Pulley Kit
      (0 reviews)
      # 98438069
      Subaru WRX / WRX STI 2004, Non-Underdrive Pulley Kit by GFB®. It is now shaped to look exactly like the factory pulley, so it goes unnoticed in your engine bay - it even uses the factory belts. A significant amount of weight has...
      $147.28
    • Go Fast Bits® Underdrive Crankshaft Pulley Kit
      (0 reviews)
      # 102537923
      Subaru WRX / WRX STI 2004, Underdrive Crankshaft Pulley Kit by GFB®. 3-piece underdrive pulley kit. Made from anodized aircraft-grade aluminium and offers sharper throttle response and faster acceleration. For Pulley Kits part #...
      $301.91
    • PERRIN Performance® Lightweight Crank Pulley
      (0 reviews)
      # 73693817
      Subaru WRX 2004, Lightweight Crank Pulley by PERRIN Performance®. A true weight savings that can be felt with every blip of the gas pedal. Lighten up your rotating engine parts to free up power. The PERRIN Performance Crank Pulley...
      Reduced weight and increased throttle response, horsepower, and torquePerfectly fits all 1993 or newer Subaru boxer engines
      $119.70
    • Fluidampr® Performance Damper
      (0 reviews)
      # 84981622
      Subaru WRX 2004, Performance Damper by Fluidampr®. A Fluidampr performance damper provides premium, broad range control of destructive crankshaft torsional vibration for optimum performance and durability. Install as an upgrade to...
      $374.49
    • Injen® Front Intercooler Kit
      (0 reviews)
      # 98828801
      Subaru WRX 2004, Front Intercooler Kit by Injen®. Includes: Bumper Support Replacement, 14 Row, 950 Cu.In. This kit replaces the small, stock top-mount intercooler with a much larger front-mount intercooler. The increased...
      $1,588.02
    • Mishimoto® Intercooler Kit
      (0 reviews)
      # 81007267
      Subaru WRX 2004, Intercooler Kit by Mishimoto®. OEM intercooler setups are not designed to handle the higher levels of boost that result from modifying your turbocharged vehicle. The Mishimoto Intercooler is manufactured with...
      Direct fitProvides 35°F temperature drop compared to stock intercooler on a stage 2 tune
      $580.00 - $1,064.00
    • PERRIN Performance® Front Mount Intercooler
      (0 reviews)
      # 73693720
      Subaru WRX / WRX STI 2004, Front Mount Intercooler by PERRIN Performance®. Swap out your overheated factory top mount intercooler for the PERRIN Front Mount Intercooler to get the most out of your vehicle . Add power and a new bold...
      Bar and plate core design for maximum durabilitySturdy steel support beams
      $819.00 - $891.00
    • AVO® Front Top Mount Intercooler
      (0 reviews)
      # 93466841
      Subaru WRX 2004, Front Top Mount Intercooler by AVO®. Includes: Black Piping.
      $1,200.00
    • AVO® Top Mount Intercooler
      (0 reviews)
      # 62402067
      Subaru WRX 2004, Top Mount Intercooler by AVO®.
      $730.00 - $899.99
    • HKS® Intercooler Kit
      (0 reviews)
      # 97200610
      Subaru WRX 2004, Intercooler Kit by HKS®. Size: 600 mm x 244 mm x 65 mm. Type: S. All HKS Intercoolers improve both the efficiency and power of any turbocharged application by rapidly reducing inherent heat levels of the compressed...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1,412.81
    • PERRIN Performance® Oil Cooler Kit
      (0 reviews)
      # 73693068
      Subaru WRX / WRX STI 2004, Oil Cooler Kit by PERRIN Performance®. Reduce engine oil temperatures, extend engine life, and keep your horsepower consistent with a PERRIN oil cooler. In racing conditions engine oil temperature...
      Helps control engine oil temperaturesEfficient heat dissipation
      $670.50
    • PERRIN Performance® Pitch Stop Mount
      (0 reviews)
      # 73693832
      Subaru WRX / WRX STI 2004, Pitch Stop Mount by PERRIN Performance®. Reduce drivetrain shudder under hard acceleration by installing a PERRIN Pitch Stop mount. Subaru's with power and drivetrain upgrades will need PERRIN's more...
      Reduces drivetrain movements under hard accelerationAdds power to the wheels by eliminating lost energy
      $105.30
    • Weapon-R® Aluminium Engine Torque Damper Kit
      (0 reviews)
      # 290064
      Subaru WRX 2004, Aluminium Engine Torque Damper Kit by Weapon-R®. Eliminate flex in the drivetrain, get more power to the ground and improve shift quality with this Torque Damper Kit.
      $187.00
    • Weapon-R® Neo-Ti Engine Torque Damper Kit
      (0 reviews)
      # 284971
      Subaru WRX 2004, Neo-Ti Engine Torque Damper Kit by Weapon-R®. Eliminate flex in the drivetrain, get more power to the ground and improve shift quality with this Neo-Titanium Finish Torque Damper Kit.
      $221.00
    • Brian Crower® Darton MID™ Block Sleeves
      (0 reviews)
      # 98906789
      Subaru WRX 2004, Darton MID™ Block Sleeves by Brian Crower®. The Darton MID™ Sleeve Kit is available for many series of 4, 6, and 8 cylinder import and domestic engines and provides for maximum bore sizes and boost potential.
      $506.69
    • Go Fast Bits® Deceptor Pro II Bias Venting Diverter Blow Off Valve
      (0 reviews)
      # 104422309
      Subaru WRX / WRX STI 2004, Deceptor Pro II Bias Venting Diverter Blow Off Valve by GFB®.
      $35.10 - $423.90
    • Go Fast Bits® Respons TMS Adjustable Bias Venting Diverter Blow Off Valve
      (0 reviews)
      # 104422454
      Subaru WRX / WRX STI 2004, Respons TMS Adjustable Bias Venting Diverter Blow Off Valve by GFB®.
      $35.10 - $281.70
    • PERRIN Performance® Electronic Boost Control Solenoid
      (0 reviews)
      # 84938471
      Subaru WRX 2004, Electronic Boost Control Solenoid by PERRIN Performance®. The 3-port Electronic Boost Control Solenoid (EBCS Pro) is designed to control today's high performance turbochargers with its ultra-fast response and...
      Durable construction that can handle extreme underhood temperaturesEstimated DIT Install time: 20 minites
      $135.00
    • PERRIN Performance® Manual Boost Controller
      (0 reviews)
      # 74187451
      Subaru WRX / WRX STI 2004, Manual Boost Controller by PERRIN Performance®. The PERRIN Manual Boost Controller is a simple inline device that allows you to set your desired boost level with a few simple twists of the body. Easily...
      Allows for simple and easy boost controlBody design ensures easy adjustment
      $103.50
    • PERRIN Performance® Recirculating Blow Off Valve
      (0 reviews)
      # 73693764
      Subaru WRX 2004, Recirculating Blow Off Valve by PERRIN Performance®. Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick. With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is...
      Sized to relieve any amount of boost pressureMaintains air within the boost system without reducing turbo response
      $310.50
    • PERRIN Performance® Rotated Turbo Downpipe
      (0 reviews)
      # 75117068
      Subaru WRX 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 and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $720.00
    • PERRIN Performance® Rotated Turbo Downpipe and Up-Pipe Kit
      (0 reviews)
      # 76264419
      Subaru WRX 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 your...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1,128.60
    • PERRIN Performance® Rotated Turbo Up-Pipe
      (0 reviews)
      # 75117074
      Subaru WRX 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
      $401.40
    • PERRIN Performance® Turbo Heat Shield
      (0 reviews)
      # 92346246
      Subaru WRX 2004, Turbo Heat Shield by PERRIN Performance®. The PERRIN turbo heat shield is CNC formed from 304 stainless steel. The backside of the shield is cut to fit all aftermarket downpipes. It is also adjustable front to back...
      Durable stainless steel constructionHelps keep heat under the shield
      $75.60
    • PERRIN Performance® Turbo Thermal Blanket
      (0 reviews)
      # 92346248
      Subaru WRX 2004, Turbo Thermal Blanket by PERRIN Performance®. PERRIN Thermal Blankets will improve response while lowering under hood temperatures. Thermal losses from headers, uppipes and turbine housings, cool exhaust...
      Improves power and protects under hood components from heatFits snugly around the turbine housing of your turbo
      $129.60
    • Turbosmart® Blow-Off Valve
      (0 reviews)
      # 31836866
      Subaru WRX / WRX STI 2004, Blow-Off Valve by Turbosmart®. Completely redesigned for 2011, this product by Turbosmart is 46% lighter and 25% smaller than the previous model. Designed to provide greater performance through faster...
      Designed for use on large-capacity turbocharger systems and high-horsepower enginesBrings maximum possible performance through faster turbo spool-up from idle and reduced turbo lag between gears
      $166.04 - $332.09
    • AVO® Adjustable Solid Boost Actuator
      (0 reviews)
      # 93466854
      Subaru WRX 2004, Adjustable Solid Boost Actuator by AVO®.
      $170.00
    • AVO® Blow Off Valve
      (0 reviews)
      # 87764887
      Subaru WRX 2004, Blow Off Valve by AVO®.
      $249.99 - $250.00
    • PERRIN Performance® Oil Cap
      (0 reviews)
      # 73693820
      Subaru WRX 2004, Oil Cap by PERRIN Performance®. Replace the yellow plastic OEM oil fill cap the sexy billet oil fill cap from PERRIN. The PERRIN Aluminum oil cap is the finishing touch to your engine bay leaving a clean and...
      Adds a touch of style to the engine bayDurable, corrosion-resistant billet aluminum construction
      $54.00
    • APEXi® Metal Head Gasket
      (0 reviews)
      # 62614542
      Subaru WRX 2004, Metal Head Gasket by APEXi®.
      $281.41
    • Brian Crower® Single Valve Spring and Steel Retainer Kit
      (0 reviews)
      # 98905026
      Subaru WRX / WRX STI 2004, Single Valve Spring and Steel Retainer Kit by Brian Crower®. Subaru Ej Series, Toyota 3Sgte/Ge. Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean,...
      $160.98
    • Brian Crower® Steel Retainers
      (0 reviews)
      # 98906801
      Subaru WRX 2004, Steel Retainers by Brian Crower®. Subaru Ej205-WRX/Ej257-Sti, Toyota 3Sgte).
      $81.73
    • Brian Crower® Titanium Retainers
      (0 reviews)
      # 98906812
      Subaru WRX 2004, Titanium Retainers by Brian Crower®. Set of 16. Stem Size: 6.0mm. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances.
      $169.11
    • Brian Crower® Valve Guides
      (0 reviews)
      # 98906814
      Subaru WRX 2004, Valve Guides by Brian Crower®. BC premium valves guides are made from Manganese Silicon Aluminum Bronze alloy and CNC machined to exacting tolerances.
      $65.77
    • Brian Crower® Valve Spring and Titanium Retainer Kit
      (0 reviews)
      # 98906817
      Subaru WRX 2004, Valve Spring and Titanium Retainer Kit by Brian Crower®. Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary...
      $248.29 - $449.07




    Guides & Articles

    • Performance Engine Cooling
      Auxiliary Oil Coolers Keep Engine Oil Temperature Under Control
      You may have seen Performance Engine Oil Coolers for sale on our website or elsewhere, and your first reaction may have been "who needs one of those? Not I." We can't say we blame you if your presumption is that either a) your engine is cooled by liquid antifreeze/coolant, so this thing can't be for you; or b) the word "performance" led you to conclude that hot-rodders are the primary target for these add-ons. In fact, if you tow a trailer, or tend to load up your SUV to the max, or drive at high speeds in very hot summer climes, you just might be the real target customer for an engine oil cooler. Allow us to provide some educational background on motor oil, and the critical roles (plural) it plays. Please read on!
    • Replacement Engine Parts
      Fan Belt? Alternator Belt? Serpentine Belt? Similarities and Differences
      Look up "fan belt" in any modern automotive dictionary, and you'll typically find a definition that reads, "An endless belt used to transmit power from a crankshaft-driven pulley to a pulley driving the fan, alternator, or other engine accessory. It is usually V-shaped in cross section with the point of the V fitting into a groove in the pulley".
    • Replacement Engine Parts
      Timing Gears, Chains And Belts Keep Your Camshaft Correctly Timed!
      Does your ride have timing gears, a timing belt, or a timing chain? Is one better than the other? And perhaps most importantly, do I need to be concerned about the recommendation to replace the timing belt at a certain mileage interval? Welcome to our discussion of "engine timing".
    • Replacement Engine Parts
      Glossary of Engine Internal Parts
      Internal combustion engines are extremely complex and feature a wide array of components that rotate, move up and down, pump, seal, or remain stationary. When repairing or rebuilding your engine, you will come across many different terms when referencing repair manuals and ordering parts. We know it can be confusing, especially when the repair is complex. Even if you are paying a professional to do the work, it’s good to be conversant with the topic. In order to help you understand the terminology of engine components, we’ve created the following glossary, listed in alphabetical order.

    Popular Products

    2004 Subaru WRX Performance Engine Parts Reviews

    Average rating:  5  5 - 6 reviews
    5 of 5
    BorgWarner
    Installed it last month and instantly felt more horsepower. Not to mention that it made my engine sound better. I would highly recommend this to anyone looking for way to boost the power.
    RPosted by Roy (Louisville, KY) /
    Was this review helpful for you? Yes2  people found this review helpful.
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    2004 Subaru WRX Models
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