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
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IAG EJ Competition Oil Pan Package
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $799.99Sale price $799.99 Regular priceUnit price per$799.99 -
![Perrin Performance [02 - 14 WRX, 04 - 21 STI] Alternator Pulley Blue | Also Fits Impreza 1993 - 2016 / Forester 1998 - 2010 / Outback 2000 - 2009 / Legacy 2000 - 2009 | PSP - ENG - 118BL - JDMusclePulleysperPSP-ENG-118BL](//jdmuscleusa.com/cdn/shop/products/perrin-performance-02-14-wrx-04-21-sti-alternator-pulley-blue-also-fits-impreza-1993-2016-forester-1998-2010-outback-2000-2009-legacy-2000-2009-psp-eng-118bl-9461788.jpg?v=1770334521&width=220)
![Perrin Performance [02 - 14 WRX, 04 - 21 STI] Alternator Pulley Blue | Also Fits Impreza 1993 - 2016 / Forester 1998 - 2010 / Outback 2000 - 2009 / Legacy 2000 - 2009 | PSP - ENG - 118BL - JDMusclePulleysperPSP-ENG-118BL](//jdmuscleusa.com/cdn/shop/products/perrin-performance-02-14-wrx-04-21-sti-alternator-pulley-blue-also-fits-impreza-1993-2016-forester-1998-2010-outback-2000-2009-legacy-2000-2009-psp-eng-118bl-4036182.jpg?v=1770334521&width=220)
Up to $15.25 offPerrin Performance Alternator Pulley Blue | Also Fits Impreza 1993-2016 / Forester 1998-2010 / Outback 2000-2009 / Legacy 2000-2009 | PSP-ENG-118BL
Fits: 02-14 WRX, 04-21 STI
Regular price $45.75Sale price $45.75 Regular priceUnit price per$61.00 -
![Radium Engineering [08-21 WRX/STI] V2 Fuel Pump Hanger for use w/ Walbro 255LPH | GSS342 or AEM 340LPH | 50-1200 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0780-00](//jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-v2-fuel-pump-hanger-for-use-w-walbro-255lph-gss342-or-aem-340lph-50-1200-pumps-9489482.jpg?v=1781013619&width=220)
![Radium Engineering [08-21 WRX/STI] V2 Fuel Pump Hanger for use w/ Walbro 255LPH | GSS342 or AEM 340LPH | 50-1200 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0780-00](//jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-v2-fuel-pump-hanger-for-use-w-walbro-255lph-gss342-or-aem-340lph-50-1200-pumps-5575397.jpg?v=1781013619&width=220)
Up to $26 off
In StockRadium Engineering V2 Fuel Pump Hanger for use w/ Walbro 255LPH | GSS342 or AEM 340LPH | 50-1200 Pumps
Fits: 08-21 WRX/STI
Only 10 leftRegular price $493.95Sale price $493.95 Regular priceUnit price per$519.95 -
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 LGT, 07 - 11 FXT] Fuel Injectors Top Feed 1300x - JDMuscleFuel Injectors and Accessoriescobb312230](//jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-lgt-07-11-fxt-fuel-injectors-top-feed-1300x-2633778.jpg?v=1775590690&width=220)
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 LGT, 07 - 11 FXT] Fuel Injectors Top Feed 1300x - JDMuscleFuel Injectors and Accessoriescobb312230](//jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-lgt-07-11-fxt-fuel-injectors-top-feed-1300x-6193334.jpg?v=1775590690&width=220)
Up to $8 offCOBB Fuel Injectors Top Feed 1300x
Fits: 02-14 WRX, 07-21 STI, 07-12 LGT, 07-11 FXT
Regular price $952.00Sale price $952.00 Regular priceUnit price per$960.00 -
Forced Performance FP GREEN Turbocharger 84mm 8cm IWG w/ Oil Feed Line Subaru STI 2004+ / WRX 2002-2007 | 2025110
Regular price $1,539.00Sale price $1,539.00 Regular priceUnit price per$1,539.00 -
![Killer B Motorsport [02-07 WRX, 04-21 STI] Extreme Flow Hard Cast Aluminum Turbo Inlet | EJTI](//jdmuscleusa.com/cdn/shop/products/716ec7343050a4ae23c2fcccac1a4b67.jpg?v=1626227143&width=220)
![Killer B Motorsport [02-07 WRX, 04-21 STI] Extreme Flow Hard Cast Aluminum Turbo Inlet | EJTI](//jdmuscleusa.com/cdn/shop/products/6413330258b763122587f03f16a136ef.jpg?v=1626227143&width=220)
Killer B Motorsport Extreme Flow Hard Cast Aluminum Turbo Inlet | EJTI
Fits: 02-07 WRX, 04-21 STI
Regular price $373.00Sale price $373.00 Regular priceUnit price per$373.00 -
![Mishimoto [02-14 WRX, 04-21 STI] Titanium Turbo Blanket - JDMuscleHeat Isolation & Heat WrapmisMMTB-WRX-01](//jdmuscleusa.com/cdn/shop/products/mishimoto-02-14-wrx-04-21-sti-titanium-turbo-blanket-1304997.jpg?v=1781013555&width=220)
![Mishimoto [02-14 WRX, 04-21 STI] Titanium Turbo Blanket - JDMuscleHeat Isolation & Heat WrapmisMMTB-WRX-01](//jdmuscleusa.com/cdn/shop/products/mishimoto-02-14-wrx-04-21-sti-titanium-turbo-blanket-5379991.png?v=1781013556&width=220)
Up to $9.05 off
In StockMishimoto Titanium Turbo Blanket
Fits: 02-14 WRX, 04-21 STI
Only 7 leftRegular price $85.95Sale price $85.95 Regular priceUnit price per$95.00 -
Up to $60 off
In StockPLM Precision Works Top Feed Fuel Rails WRX 2002-2014 / STI 2007-2020 / Legacy GT 2008-2012 / Forester XT 2006-2013 | PW-TOP-FEED-FR-SUB
Only 8 leftRegular price $135.00Sale price $135.00 Regular priceUnit price per$195.00 -
Up to $39.50 off
In StockPerrin 02-14 WRX / 04-21 STI / 05-09 Legacy / 04-13 Forester Lightened Crank Pulley Blue | PSP-ENG-100BL
Only 12 leftRegular price $118.50Sale price $118.50 Regular priceUnit price per$158.00 -
Up to $20.50 off
In StockPerrin Battery Tie Down Blue Most Subaru Models | PSP-ENG-700BL
Only 10 leftRegular price $61.50Sale price $61.50 Regular priceUnit price per$82.00 -
Up to $232.50 off
In StockPerrin 08-21 STI Top Mount Intercooler Silver | PSP-ITR-302SL
Only 8 leftRegular price $697.50Sale price $697.50 Regular priceUnit price per$930.00 -
Grimmspeed 08-14 WRX / 08-14 STI / 18-21 STI Post MAF Hose Kit Black | 125011
Regular price $121.00Sale price $121.00 Regular priceUnit price per$121.00 -
ETS 15-17 STI Cold Air Intake Kit | 15-STI-Intake
Regular price From $295.00Sale price From $295.00 Regular priceUnit price per$295.00 -
ETS Cat Back Exhaust System | 200-30-EXH-0XX
Fits: 15-21 WRX/STI
Regular price From $1,295.00Sale price From $1,295.00 Regular priceUnit price per$1,295.00 -
![Perrin [08-14 WRX, 08-15 STI] Carb Approved Cold Air Intake Red | PSP-INT-322RD](//jdmuscleusa.com/cdn/shop/files/PSP-INT-322RD_01.jpg?v=1759352850&width=220)
![Perrin [08-14 WRX, 08-15 STI] Carb Approved Cold Air Intake Red | PSP-INT-322RD](//jdmuscleusa.com/cdn/shop/files/PSP-INT-322RD_05.jpg?v=1758312893&width=220)
Up to $102.50 off
In StockPerrin Carb Approved Cold Air Intake Red | PSP-INT-322RD
Fits: 08-14 WRX, 08-15 STI
Only 9 leftRegular price $307.50Sale price $307.50 Regular priceUnit price per$410.00 -
Up to $74.98 off
In StockTurbo XS 02-07 WRX / 04-21 STI RFL Series Hybrid Blow Off Valve | TXS-WS-HYB
Only 3 leftRegular price $250.00Sale price $250.00 Regular priceUnit price per$324.98
![Perrin Performance [02 - 14 WRX, 04 - 21 STI] Alternator Pulley Blue | Also Fits Impreza 1993 - 2016 / Forester 1998 - 2010 / Outback 2000 - 2009 / Legacy 2000 - 2009 | PSP - ENG - 118BL - JDMusclePulleysperPSP-ENG-118BL](http://jdmuscleusa.com/cdn/shop/products/perrin-performance-02-14-wrx-04-21-sti-alternator-pulley-blue-also-fits-impreza-1993-2016-forester-1998-2010-outback-2000-2009-legacy-2000-2009-psp-eng-118bl-9461788.jpg?v=1770334521&width=220)
![Perrin Performance [02 - 14 WRX, 04 - 21 STI] Alternator Pulley Blue | Also Fits Impreza 1993 - 2016 / Forester 1998 - 2010 / Outback 2000 - 2009 / Legacy 2000 - 2009 | PSP - ENG - 118BL - JDMusclePulleysperPSP-ENG-118BL](http://jdmuscleusa.com/cdn/shop/products/perrin-performance-02-14-wrx-04-21-sti-alternator-pulley-blue-also-fits-impreza-1993-2016-forester-1998-2010-outback-2000-2009-legacy-2000-2009-psp-eng-118bl-4036182.jpg?v=1770334521&width=220)
![Radium Engineering [08-21 WRX/STI] V2 Fuel Pump Hanger for use w/ Walbro 255LPH | GSS342 or AEM 340LPH | 50-1200 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0780-00](http://jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-v2-fuel-pump-hanger-for-use-w-walbro-255lph-gss342-or-aem-340lph-50-1200-pumps-9489482.jpg?v=1781013619&width=220)
![Radium Engineering [08-21 WRX/STI] V2 Fuel Pump Hanger for use w/ Walbro 255LPH | GSS342 or AEM 340LPH | 50-1200 Pumps - JDMuscleFuel Pumps and Accessoriesrad20-0780-00](http://jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-v2-fuel-pump-hanger-for-use-w-walbro-255lph-gss342-or-aem-340lph-50-1200-pumps-5575397.jpg?v=1781013619&width=220)
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 LGT, 07 - 11 FXT] Fuel Injectors Top Feed 1300x - JDMuscleFuel Injectors and Accessoriescobb312230](http://jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-lgt-07-11-fxt-fuel-injectors-top-feed-1300x-2633778.jpg?v=1775590690&width=220)
![COBB [02 - 14 WRX, 07 - 21 STI, 07 - 12 LGT, 07 - 11 FXT] Fuel Injectors Top Feed 1300x - JDMuscleFuel Injectors and Accessoriescobb312230](http://jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-07-21-sti-07-12-lgt-07-11-fxt-fuel-injectors-top-feed-1300x-6193334.jpg?v=1775590690&width=220)
![Killer B Motorsport [02-07 WRX, 04-21 STI] Extreme Flow Hard Cast Aluminum Turbo Inlet | EJTI](http://jdmuscleusa.com/cdn/shop/products/716ec7343050a4ae23c2fcccac1a4b67.jpg?v=1626227143&width=220)
![Killer B Motorsport [02-07 WRX, 04-21 STI] Extreme Flow Hard Cast Aluminum Turbo Inlet | EJTI](http://jdmuscleusa.com/cdn/shop/products/6413330258b763122587f03f16a136ef.jpg?v=1626227143&width=220)
![Mishimoto [02-14 WRX, 04-21 STI] Titanium Turbo Blanket - JDMuscleHeat Isolation & Heat WrapmisMMTB-WRX-01](http://jdmuscleusa.com/cdn/shop/products/mishimoto-02-14-wrx-04-21-sti-titanium-turbo-blanket-1304997.jpg?v=1781013555&width=220)
![Mishimoto [02-14 WRX, 04-21 STI] Titanium Turbo Blanket - JDMuscleHeat Isolation & Heat WrapmisMMTB-WRX-01](http://jdmuscleusa.com/cdn/shop/products/mishimoto-02-14-wrx-04-21-sti-titanium-turbo-blanket-5379991.png?v=1781013556&width=220)
![Perrin [08-14 WRX, 08-15 STI] Carb Approved Cold Air Intake Red | PSP-INT-322RD](http://jdmuscleusa.com/cdn/shop/files/PSP-INT-322RD_01.jpg?v=1759352850&width=220)
![Perrin [08-14 WRX, 08-15 STI] Carb Approved Cold Air Intake Red | PSP-INT-322RD](http://jdmuscleusa.com/cdn/shop/files/PSP-INT-322RD_05.jpg?v=1758312893&width=220)
