Optimize your Subaru STI 2015-2021 engine's performance with a comprehensive range of top-quality aftermarket parts from industry-leading brands. Elevate the power and efficiency of your vehicle with ETS, HKS, Perrin, Mishimoto, AMS, Grimmspeed, Cobb, Remark, PLM, Turbosmart, IAG Performance, and more. Enhance airflow and filtration through AIR INTAKE DUCTS and COLD AIR INTAKES, while maintaining engine cleanliness with AIR OIL SEPARATORS and CATCH CANS. Experience impeccable control and responsiveness with BLOW OFF VALVES and BOOST CONTROL SOLENOID COVERS, complemented by the reliability of ENGINE MOUNTS and meticulously crafted ENGINE MANAGEMENT HARNESSES. Simplify maintenance and improve overall performance with DIPSTICKS and explore comprehensive ENGINE PACKAGE DEALS for a holistic approach to upgrading your Subaru WRX's engine. Unleash the full potential of your vehicle through precision-engineered components designed to deliver both power and durability, all meticulously designed to give your Subaru STI the edge on the road or track.
2015-2021 Subaru WRX STI Engine Parts
-
Grimmspeed 04-21 STI / 02-07 WRX V2 Bypass Valve Black | 126032BLK
Regular price $352.00Sale price $352.00 Regular priceUnit price per$352.00 -
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](//jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-4918766.jpg?v=1770330553&width=220)
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](//jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-8528183.jpg?v=1770330553&width=220)
Up to $29.25 off
In StockPerrin Belt Cover Hyper Pink
Fits: 02-14 WRX, 04-21 STI
Only 8 leftRegular price $87.75Sale price $87.75 Regular priceUnit price per$117.00 -
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](//jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-8112980.jpg?v=1770331224&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](//jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-2248205.jpg?v=1770331225&width=220)
IAG Street Series Oil Pan Package
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price From $699.99Sale price From $699.99 Regular priceUnit price per$699.99 -
![Radium Engineering [08-21 WRX/STI, 05-09 LGT/OBXT] V2 Fuel Pump Hanger for use w/ Walbro 450LPH | F90000267/274/285 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0782-00](//jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgtobxt-v2-fuel-pump-hanger-for-use-w-walbro-450lph-f90000267274285-pumps-6792551.jpg?v=1781013619&width=220)
![Radium Engineering [08-21 WRX/STI, 05-09 LGT/OBXT] V2 Fuel Pump Hanger for use w/ Walbro 450LPH | F90000267/274/285 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0782-00](//jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgtobxt-v2-fuel-pump-hanger-for-use-w-walbro-450lph-f90000267274285-pumps-8701445.jpg?v=1781013620&width=220)
Up to $27 off
In StockRadium Engineering V2 Fuel Pump Hanger for use w/ Walbro 450LPH | F90000267/274/285 Pumps
Fits: 08-21 WRX/STI, 05-09 LGT/OBXT
Only 13 leftRegular price $512.95Sale price $512.95 Regular priceUnit price per$539.95 -
![FactionFab [15-21 WRX, 15-18 STI] Axle Back Exhaust w/ Onyx Black Tip | FFA1.10204.3 - JDMuscleAxle Back ExhaustsFFA1.10204.3](//jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrx-15-18-sti-axle-back-exhaust-w-onyx-black-tip-ffa1102043-8505424.jpg?v=1781014101&width=220)
![FactionFab [15-21 WRX, 15-18 STI] Axle Back Exhaust w/ Onyx Black Tip | FFA1.10204.3 - JDMuscleAxle Back ExhaustsFFA1.10204.3](//jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrx-15-18-sti-axle-back-exhaust-w-onyx-black-tip-ffa1102043-8240786.jpg?v=1781014101&width=220)
FactionFab Axle Back Exhaust w/ Onyx Black Tip | FFA1.10204.3
Fits: 15-21 WRX, 15-18 STI
Regular price $439.20Sale price $439.20 Regular priceUnit price per$395.00 -
![Grimmspeed [08-21 STI] Electronic Boost Control Solenoid Cover Red | 112000.1](//jdmuscleusa.com/cdn/shop/products/71f0a2b859a69208469686b40823a198.jpg?v=1625540441&width=220)
![Grimmspeed [08-21 STI] Electronic Boost Control Solenoid Cover Red | 112000.1](//jdmuscleusa.com/cdn/shop/products/b1946da1e56ab3842da05068f67450c0.jpg?v=1625540441&width=220)
Grimmspeed Electronic Boost Control Solenoid Cover Red
Fits: 08-21 STI
Regular price $87.00Sale price $87.00 Regular priceUnit price per$87.00 -
![Perrin [08-14 WRX, 08-15 STI] Cold Air Intake - Neon Yellow](//jdmuscleusa.com/cdn/shop/files/PSP-INT-322NY_01.jpg?v=1758312546&width=220)
![Perrin [08-14 WRX, 08-15 STI] Cold Air Intake - Neon Yellow](//jdmuscleusa.com/cdn/shop/files/PSP-INT-322NY_02.jpg?v=1758312546&width=220)
Up to $107.75 off
In StockPerrin Cold Air Intake - Neon Yellow
Fits: 08-14 WRX, 08-15 STI
Only 15 leftRegular price $323.25Sale price $323.25 Regular priceUnit price per$431.00 -
Up to $89.50 off
In StockPerrin Hi-Power Cold Air Intake Neon Yellow | PSP-INT-326NY
Fits: 18-21 STI
Only 5 leftRegular price $268.50Sale price $268.50 Regular priceUnit price per$358.00 -
Grimmspeed Up Pipe 3-Bolt Inlet - Subaru 2002-2014 WRX / 2004-21 STI / 2005-2009 LGT / 2004-2013 FXT | 007064
Regular price $393.00Sale price $393.00 Regular priceUnit price per$393.00 -
Up to $13 off
In StockSeibon Carbon Fiber Hood/Trunk Prop - Universal
Only 5 leftRegular price $117.00Sale price $117.00 Regular priceUnit price per$130.00 -
Up to $160 offPerrin Neon Yellow Air Oil Separator with Top Mount Intercooler | PSP-ENG-606NY
Fits: 08-14 WRX, 04-20 STI
Regular price $412.00Sale price $412.00 Regular priceUnit price per$572.00 -
Up to $20.50 off
In StockPerrin Oil Cap Round Style Black Most Subaru Models | PSP-ENG-711BK
Only 2 leftRegular price $61.50Sale price $61.50 Regular priceUnit price per$82.00 -
Killer B Motorsport 02-14 WRX / 04-21 STI OG Style Oil Pickup | 070-110
Regular price $149.00Sale price $149.00 Regular priceUnit price per$149.00 -
Killer B Motorsport 02-14 WRX / 04-21 STI High Performance Oil Pan w/ OG Style Pick and Baffle Combo | PPBC
Regular price $681.00Sale price $681.00 Regular priceUnit price per$681.00 -
Up to $45.40 off
In StockARP 02-14 WRX / 02-21 STI Custom Age 625+ Head Stud Kit | 260-4704
Regular price $610.00Sale price $610.00 Regular priceUnit price per$655.40 -
Up to $20 off
In StockAEM Electronics E85 High Flow In-Tank Fuel Pump - Universal | 50-1200
Regular price $155.95Sale price $155.95 Regular priceUnit price per$175.95
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](http://jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-4918766.jpg?v=1770330553&width=220)
![Perrin [02 - 14 WRX, 04 - 21 STI] Belt Cover Hyper Pink | PSP - ENG - 150HP - JDMuscleBelt CoversperPSP-ENG-150HP](http://jdmuscleusa.com/cdn/shop/products/perrin-02-14-wrx-04-21-sti-belt-cover-hyper-pink-psp-eng-150hp-8528183.jpg?v=1770330553&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](http://jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-8112980.jpg?v=1770331224&width=220)
![IAG [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT, 04 - 13 FXT] Street Series Oil Pan Package | IAG - ENG - 2201 - JDMuscleOil PansIAG-ENG-2201SLSilver](http://jdmuscleusa.com/cdn/shop/products/iag-02-14-wrx-04-21-sti-05-09-lgt-04-13-fxt-street-series-oil-pan-package-iag-eng-2201-2248205.jpg?v=1770331225&width=220)
![Radium Engineering [08-21 WRX/STI, 05-09 LGT/OBXT] V2 Fuel Pump Hanger for use w/ Walbro 450LPH | F90000267/274/285 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0782-00](http://jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgtobxt-v2-fuel-pump-hanger-for-use-w-walbro-450lph-f90000267274285-pumps-6792551.jpg?v=1781013619&width=220)
![Radium Engineering [08-21 WRX/STI, 05-09 LGT/OBXT] V2 Fuel Pump Hanger for use w/ Walbro 450LPH | F90000267/274/285 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0782-00](http://jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgtobxt-v2-fuel-pump-hanger-for-use-w-walbro-450lph-f90000267274285-pumps-8701445.jpg?v=1781013620&width=220)
![FactionFab [15-21 WRX, 15-18 STI] Axle Back Exhaust w/ Onyx Black Tip | FFA1.10204.3 - JDMuscleAxle Back ExhaustsFFA1.10204.3](http://jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrx-15-18-sti-axle-back-exhaust-w-onyx-black-tip-ffa1102043-8505424.jpg?v=1781014101&width=220)
![FactionFab [15-21 WRX, 15-18 STI] Axle Back Exhaust w/ Onyx Black Tip | FFA1.10204.3 - JDMuscleAxle Back ExhaustsFFA1.10204.3](http://jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrx-15-18-sti-axle-back-exhaust-w-onyx-black-tip-ffa1102043-8240786.jpg?v=1781014101&width=220)
![Grimmspeed [08-21 STI] Electronic Boost Control Solenoid Cover Red | 112000.1](http://jdmuscleusa.com/cdn/shop/products/71f0a2b859a69208469686b40823a198.jpg?v=1625540441&width=220)
![Grimmspeed [08-21 STI] Electronic Boost Control Solenoid Cover Red | 112000.1](http://jdmuscleusa.com/cdn/shop/products/b1946da1e56ab3842da05068f67450c0.jpg?v=1625540441&width=220)
![Perrin [08-14 WRX, 08-15 STI] Cold Air Intake - Neon Yellow](http://jdmuscleusa.com/cdn/shop/files/PSP-INT-322NY_01.jpg?v=1758312546&width=220)
![Perrin [08-14 WRX, 08-15 STI] Cold Air Intake - Neon Yellow](http://jdmuscleusa.com/cdn/shop/files/PSP-INT-322NY_02.jpg?v=1758312546&width=220)
