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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![COBB [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Lightweight Crank Pulley Black - JDMusclePulleyscobb300102BK](//jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-04-21-sti-05-09-lgt-lightweight-crank-pulley-black-5680990.jpg?v=1770336372&width=220)
![COBB [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Lightweight Crank Pulley Black - JDMusclePulleyscobb300102BK](//jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-04-21-sti-05-09-lgt-lightweight-crank-pulley-black-1789589.jpg?v=1770336372&width=220)
COBB Lightweight Crank Pulley Black
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT
Regular price $169.00Sale price $169.00 Regular priceUnit price per$169.00 -
Grimmspeed Stage 1 Red Power Package WRX 15-21 | grm191010-RD
Regular price $499.66Sale price $499.66 Regular priceUnit price per$499.66 -
Subaru Oil Cap Gasket Ascent 2019-2022 / Baja 2002-2006 / BRZ 2013-2022 / Crosstrek 2013-2022 / Forester 1998-2022 / Impreza 1993-2022 / Justy 1988-1994 / Legacy 1990-2002 / Outback 2005-2022 / STI 2004-21 / WRX 2002-2022 | 803942020
Regular price $10.66Sale price $10.66 Regular priceUnit price per$10.66 -
Grimmspeed Turbocharger Replacement Oil Line Kit EJ Models | 123000
Regular price $121.00Sale price $121.00 Regular priceUnit price per$121.00 -
aFe 08-21 WRX/ 08-18 STI/ 09-16 FXT Power Magnum FLOW OER Pro DRY S Air Filter | 31-10161
Regular price $76.00Sale price $76.00 Regular priceUnit price per$76.00 -
Up to $7.50 offSeibon Carbon Fiber Tube 47in x .63in Universal | CFTUBE16
Regular price $42.50Sale price $42.50 Regular priceUnit price per$50.00 -
Up to $45.50 off
In StockTurbosmart 02-07 WRX / 04-21 STI / 06-08 FXT Dual Port Blow Off Valve | TS-0205-1015
Only 6 leftRegular price $409.49Sale price $409.49 Regular priceUnit price per$454.99 -
Up to $43.70 offTurbosmart 02-07 WRX / 04-21 STI / 06-08 FXT Plumb Back Recirculating Blow Off Valve Blue | TS-0205-1215
Regular price $393.29Sale price $393.29 Regular priceUnit price per$436.99 -
![Nameless Performance [11 - 14 WRX/STI Sedan] Axleback w/ Single Wall 3.5" Neochrome Tips and 5" Mufflers | SUAB11WRXSED - 5MU - 35NEO - JDMuscleAxle Back ExhaustsSUAB11WRXSED-5MU-35NEO](//jdmuscleusa.com/cdn/shop/products/nameless-performance-11-14-wrxsti-sedan-axleback-w-single-wall-35-neochrome-tips-and-5-mufflers-suab11wrxsed-5mu-35neo-1288131.jpg?v=1770336009&width=220)
Nameless Performance Axleback w/ Single Wall 3.5" Neochrome Tips and 5" Mufflers | SUAB11WRXSED-5MU-35NEO
Fits: 11-14 WRX/STI Sedan
Regular price $870.00Sale price $870.00 Regular priceUnit price per$0.00 -
![Nameless Performance [15 - 21, 15 - 18 STI] Axleback w/ Single wall 3.5" Neochrome Tips and No Muffler | SUAB15WRX - 0MU - 35NEO - JDMuscleAxle Back ExhaustsSUAB15WRX-0MU-35NEO](//jdmuscleusa.com/cdn/shop/products/nameless-performance-15-21-15-18-sti-axleback-w-single-wall-35-neochrome-tips-and-no-muffler-suab15wrx-0mu-35neo-1426173.jpg?v=1770336011&width=220)
![Nameless Performance [15 - 21 WRX, 15 - 18 STI] Axle Back 3.5" Single Wall Polished Tips and No Muffler | SUAB15WRX - 0MU - 35SSW - JDMuscleAxle Back ExhaustsSUAB15WRX-0MU-35SSW](//jdmuscleusa.com/cdn/shop/files/nameless-performance-15-21-wrx-15-18-sti-axle-back-35-single-wall-polished-tips-and-no-muffler-suab15wrx-0mu-35ssw-1129950.jpg?v=1770327693&width=220)
Nameless Performance Axleback w/ Single wall 3.5" Neochrome Tips and No Muffler
Fits: 15-21 WRX, 15-18 STI
Regular price $750.00Sale price $750.00 Regular priceUnit price per$0.00 -
In StockRadium Engineering 02-14 WRX / 04-21 STI Series Fuel Rail Plumbing Kit | 20-0978
Only 7 leftRegular price $379.95Sale price $379.95 Regular priceUnit price per$379.95 -
Up to $38.21 off
In StockTorque Solution Top Feed Fuel Rails Red WRX 2002-2014 / STI 2007-2020 / Legacy GT 2008-2012 / Forester XT 2006-2013 | TS-SU-400R.2
Only 4 leftRegular price $184.00Sale price $184.00 Regular priceUnit price per$222.21 -
Up to $23.32 off
In StockTorque Solution Garrett GT Turbo Oil Feed Line Kit WRX 2006-2014 / STI 2004+ | TS-SU-578
Only 4 leftRegular price $110.00Sale price $110.00 Regular priceUnit price per$133.32 -
Up to $38.21 off
In StockTorque Solution Top Feed Fuel Rails Silver WRX 2002-2014 / STI 2007-2020 / Legacy GT 2008-2012 / Forester XT 2006-2013 | TS-SU-400S.2
Only 5 leftRegular price $184.00Sale price $184.00 Regular priceUnit price per$222.21 -
Up to $38.21 off
In StockTorque Solution Top Feed Fuel Rails Gold WRX 2002-2014 / STI 2007-2020 / Legacy GT 2008-2012 / Forester XT 2006-2013 | TS-SU-400G.2
Only 8 leftRegular price $184.00Sale price $184.00 Regular priceUnit price per$222.21 -
Up to $38.21 off
In StockTorque Solution Top Feed Fuel Rails Purple WRX 2002-2014 / STI 2007-2020 / Legacy GT 2008-2012 / Forester XT 2006-2013 | TS-SU-400PR.2
Only 1 leftRegular price $184.00Sale price $184.00 Regular priceUnit price per$222.21
![COBB [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Lightweight Crank Pulley Black - JDMusclePulleyscobb300102BK](http://jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-04-21-sti-05-09-lgt-lightweight-crank-pulley-black-5680990.jpg?v=1770336372&width=220)
![COBB [02 - 14 WRX, 04 - 21 STI, 05 - 09 LGT] Lightweight Crank Pulley Black - JDMusclePulleyscobb300102BK](http://jdmuscleusa.com/cdn/shop/products/cobb-02-14-wrx-04-21-sti-05-09-lgt-lightweight-crank-pulley-black-1789589.jpg?v=1770336372&width=220)
![Nameless Performance [11 - 14 WRX/STI Sedan] Axleback w/ Single Wall 3.5" Neochrome Tips and 5" Mufflers | SUAB11WRXSED - 5MU - 35NEO - JDMuscleAxle Back ExhaustsSUAB11WRXSED-5MU-35NEO](http://jdmuscleusa.com/cdn/shop/products/nameless-performance-11-14-wrxsti-sedan-axleback-w-single-wall-35-neochrome-tips-and-5-mufflers-suab11wrxsed-5mu-35neo-1288131.jpg?v=1770336009&width=220)
![Nameless Performance [15 - 21, 15 - 18 STI] Axleback w/ Single wall 3.5" Neochrome Tips and No Muffler | SUAB15WRX - 0MU - 35NEO - JDMuscleAxle Back ExhaustsSUAB15WRX-0MU-35NEO](http://jdmuscleusa.com/cdn/shop/products/nameless-performance-15-21-15-18-sti-axleback-w-single-wall-35-neochrome-tips-and-no-muffler-suab15wrx-0mu-35neo-1426173.jpg?v=1770336011&width=220)
![Nameless Performance [15 - 21 WRX, 15 - 18 STI] Axle Back 3.5" Single Wall Polished Tips and No Muffler | SUAB15WRX - 0MU - 35SSW - JDMuscleAxle Back ExhaustsSUAB15WRX-0MU-35SSW](http://jdmuscleusa.com/cdn/shop/files/nameless-performance-15-21-wrx-15-18-sti-axle-back-35-single-wall-polished-tips-and-no-muffler-suab15wrx-0mu-35ssw-1129950.jpg?v=1770327693&width=220)
