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 [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](//jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-8299281.jpg?v=1770336328&width=220)
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](//jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-4920748.jpg?v=1770336329&width=220)
Cobb Flex Fuel Package 5 Pin
Fits: 07 STI
Regular price $875.00Sale price $875.00 Regular priceUnit price per$875.00 -
In StockCobb High Flow E85 Capable Fuel Pump
Fits: 08-14 WRX, 08-21 STI, 05-09 LGT
Regular price $193.00Sale price $193.00 Regular priceUnit price per$193.00 -
In StockFactionFab V2 FR-Spec Coilovers
Fits: 08-14 WRX
Only 6 leftRegular price $1,350.00Sale price $1,350.00 Regular priceUnit price per$1,350.00 -
FactionFab Titanium Front Brake Shim Set
Fits: 18-21 STI Brembo
Regular price $75.00Sale price $75.00 Regular priceUnit price per$75.00 -
In StockFactionFab Subaru Timing Belt Guide EJ Motors
Only 6 leftRegular price $45.00Sale price $45.00 Regular priceUnit price per$45.00 -
Fel-Pro Exhaust Pipe Flange Gasket | fel61106
Fits: 13+ BRZ, 15-21 WRX, 13-21 STI, Corolla
Regular price $20.00Sale price $20.00 Regular priceUnit price per$20.00 -
In StockFactionFab MLS Subaru EJ Exhaust Manifold to Up-Pipe Gasket
Only 11 leftRegular price $14.00Sale price $14.00 Regular priceUnit price per$14.00 -
FactionFab MLS Subaru EJ Up-Pipe to Turbo Gasket
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
In StockOVERTAKE Maxx Flo Panel Filter
Fits: 08-21 WRX, 08-18 STI, 09-18 Forester, 13-17 Crosstrek, 05-17 Legacy, 05-17 Outback
Regular price $75.00Sale price $75.00 Regular priceUnit price per$75.00 -
In StockOVERTAKE Silicone Turbo Inlet Hose
Fits: 04-21 STI, 02-07 WRX, 04-08 FXT
Regular price $280.00Sale price $280.00 Regular priceUnit price per$280.00 -
![OVERTAKE [04 - 21 STI, 06 - 07 WRX] Drive - By - Wire Throttle Body Gasket - Subaru EJ - JDMuscleGasketsA10479](//jdmuscleusa.com/cdn/shop/files/overtake-04-21-sti-06-07-wrx-drive-by-wire-throttle-body-gasket-subaru-ej-9296133.jpg?v=1770312010&width=220)
OVERTAKE Drive-By-Wire Throttle Body Gasket - Subaru EJ
Fits: 04-21 STI, 06-07 WRX
Regular price $9.00Sale price $9.00 Regular priceUnit price per -
![Cobb [18 STI Type RA] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041130-BLCobb Blue Intake System](//jdmuscleusa.com/cdn/shop/products/cobb-18-sti-type-ra-stage-3-power-package-4315478.jpg?v=1770336149&width=220)
![Cobb [18 STI Type RA] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041130-BLCobb Blue Intake System](//jdmuscleusa.com/cdn/shop/products/cobb-18-sti-type-ra-stage-3-power-package-9711137.jpg?v=1770336149&width=220)
Cobb Stage 3 Power Package
Fits: 18 STI Type RA
Regular price $5,270.00Sale price $5,270.00 Regular priceUnit price per$5,270.00 -
![Cobb [15 - 18 STI] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041030-BKStealth Black Intake System](//jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-power-package-6230387.jpg?v=1770336147&width=220)
![Cobb [15 - 18 STI] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041030-BKStealth Black Intake System](//jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-power-package-5986495.jpg?v=1770336147&width=220)
Cobb Stage 3 Power Package
Fits: 15-18 STI
Regular price $5,245.00Sale price $5,245.00 Regular priceUnit price per$5,245.00 -
![Cobb [15 - 18 STI] Stage 3 + Flex Fuel Power Package - JDMuscleEngine Package DealscobbSUB004103F-BLCobb Blue Intake System](//jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-flex-fuel-power-package-2828061.jpg?v=1770336144&width=220)
![Cobb [15 - 18 STI] Stage 3 + Flex Fuel Power Package - JDMuscleEngine Package DealscobbSUB004103F-BLCobb Blue Intake System](//jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-flex-fuel-power-package-2154310.jpg?v=1770336145&width=220)
Cobb Stage 3 + Flex Fuel Power Package
Fits: 15-18 STI
Regular price $6,220.00Sale price $6,220.00 Regular priceUnit price per$6,220.00 -
In StockOVERTAKE Radiator Hose Kit - Subaru 2008-2014 WRX, 2008-2021 STI, 2009-2013 Forester XT
Regular price $109.00Sale price $109.00 Regular priceUnit price per$109.00 -
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](//jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-5145936.webp?v=1770321317&width=220)
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](//jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-2357880.webp?v=1770321317&width=220)
In StockCobb 2in. Stainless Steep Up-Pipe
Fits: 04-21 STI Incl. Type RA/S209, 06-14 WRX, 06-13 FXT
Regular price $275.00Sale price $275.00 Regular priceUnit price per$275.00
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](http://jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-8299281.jpg?v=1770336328&width=220)
![Cobb [07 STI] Flex Fuel Package 5 Pin - JDMuscleFlex FuelcobbSUBFFGD002](http://jdmuscleusa.com/cdn/shop/products/cobb-07-sti-flex-fuel-package-5-pin-4920748.jpg?v=1770336329&width=220)
![OVERTAKE [04 - 21 STI, 06 - 07 WRX] Drive - By - Wire Throttle Body Gasket - Subaru EJ - JDMuscleGasketsA10479](http://jdmuscleusa.com/cdn/shop/files/overtake-04-21-sti-06-07-wrx-drive-by-wire-throttle-body-gasket-subaru-ej-9296133.jpg?v=1770312010&width=220)
![Cobb [18 STI Type RA] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041130-BLCobb Blue Intake System](http://jdmuscleusa.com/cdn/shop/products/cobb-18-sti-type-ra-stage-3-power-package-4315478.jpg?v=1770336149&width=220)
![Cobb [18 STI Type RA] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041130-BLCobb Blue Intake System](http://jdmuscleusa.com/cdn/shop/products/cobb-18-sti-type-ra-stage-3-power-package-9711137.jpg?v=1770336149&width=220)
![Cobb [15 - 18 STI] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041030-BKStealth Black Intake System](http://jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-power-package-6230387.jpg?v=1770336147&width=220)
![Cobb [15 - 18 STI] Stage 3 Power Package - JDMuscleEngine Package DealscobbSUB0041030-BKStealth Black Intake System](http://jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-power-package-5986495.jpg?v=1770336147&width=220)
![Cobb [15 - 18 STI] Stage 3 + Flex Fuel Power Package - JDMuscleEngine Package DealscobbSUB004103F-BLCobb Blue Intake System](http://jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-flex-fuel-power-package-2828061.jpg?v=1770336144&width=220)
![Cobb [15 - 18 STI] Stage 3 + Flex Fuel Power Package - JDMuscleEngine Package DealscobbSUB004103F-BLCobb Blue Intake System](http://jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-stage-3-flex-fuel-power-package-2154310.jpg?v=1770336145&width=220)
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](http://jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-5145936.webp?v=1770321317&width=220)
![Cobb [04 - 21 STI Incl. Type RA/S209, 06 - 14 WRX, 06 - 13 FXT] 2in. Stainless Steep Up - Pipe - JDMuscleTurbo Uppipescobb512265](http://jdmuscleusa.com/cdn/shop/files/cobb-04-21-sti-incl-type-ras209-06-14-wrx-06-13-fxt-2in-stainless-steep-up-pipe-2357880.webp?v=1770321317&width=220)