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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HKS 15-21 STI Dry Carbon Surround for Racing Cold Air Intake Kit | 70026-AF005
Regular price $968.00Sale price $968.00 Regular priceUnit price per$968.00 -
In StockHKS 15-21 STI Racing Cold Air Intake Kit w/ Dry Carbon Surround | 70026-AF004
Only 8 leftRegular price $1,408.00Sale price $1,408.00 Regular priceUnit price per$1,408.00 -
Up to $24 off
In StockRadium Fuel Hanger Plumbing Kit Microglass Subaru Impreza 2008-21 / Forester 2008-2014 / Legacy 2005-2009 / Outback 2005-2009 / STi 2015+ | 20-0629-05
Only 5 leftRegular price $455.95Sale price $455.95 Regular priceUnit price per$479.95 -
Up to $1.32 offTorque Solution Fixed Wastegate Bracket WRX 2008-2014 / STI 2004-21 w/ IHI VF Turbo | TS-SU-436.2
Regular price $32.00Sale price $32.00 Regular priceUnit price per$33.32 -
Subaru OEM IHI VF48 Turbocharger Subaru STI 2008+ | 14411AA700
Regular price $2,404.61Sale price $2,404.61 Regular priceUnit price per$2,404.61 -
Wagner Tuning Competition Intercooler Kit WRX 2014+ / STI 2014+ | 200001115
Regular price $790.00Sale price $790.00 Regular priceUnit price per$790.00 -
MagnaFlow EPA Compliant Direct-Fit Catalytic Converte Subaru STi 2015+ | 49160
Regular price $1,053.00Sale price $1,053.00 Regular priceUnit price per$1,053.00 -
In StockaFe Takeda Momentum Pro 5R Cold Air Intake System WRX 2018-21 / STI H4-2.5L 2018-21 | 56-70014R
Only 6 leftRegular price $410.00Sale price $410.00 Regular priceUnit price per$410.00 -
MAPerformance Catback Exhaust System | 15-2020 WRX 15-2020 / STI 15-2020 | WRX-4G-CB-NM-REV2-PARENT
Regular price From $999.99Sale price From $999.99 Regular priceUnit price per -
MAPerformance Axle-Back Exhaust WRX 15-2018 / STI 15-21 | WRX-4G-RMD-SCB-REV2-PARENT
Regular price From $324.99Sale price From $324.99 Regular priceUnit price per -
![Cobb [15 - 21 WRX /STI] Front Mount Intercooler Core Only Silver - JDMuscleIntercoolerscobb716500-SL](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrx-sti-front-mount-intercooler-core-only-silver-4568232.jpg?v=1770336212&width=220)
![Cobb [15 - 21 WRX /STI] Front Mount Intercooler Core Only Silver - JDMuscleIntercoolerscobb716500-SL](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrx-sti-front-mount-intercooler-core-only-silver-3232981.jpg?v=1770336212&width=220)
In StockCobb Front Mount Intercooler Core Only Silver
Fits: 15-21 WRX /STI
Only 5 leftRegular price $1,150.00Sale price $1,150.00 Regular priceUnit price per$1,150.00 -
![Cobb [15 - 21 STI] Front Mount Intercooler Cold Side Piping - JDMuscleIntercooler Piping Kitscobb716500-C](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-cold-side-piping-9040543.jpg?v=1770336213&width=220)
![Cobb [15 - 21 STI] Front Mount Intercooler Cold Side Piping - JDMuscleIntercooler Piping Kitscobb716500-C](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-cold-side-piping-4306361.jpg?v=1770336213&width=220)
In StockCobb Front Mount Intercooler Cold Side Piping
Fits: 15-21 STI
Only 12 leftRegular price $475.00Sale price $475.00 Regular priceUnit price per$475.00 -
![COBB [15 - 21 STI] Front Mount Intercooler Hot Side Piping - JDMuscleIntercooler Piping Kitscobb716500-H](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-hot-side-piping-1813470.jpg?v=1770336213&width=220)
![COBB [15 - 21 STI] Front Mount Intercooler Hot Side Piping - JDMuscleIntercooler Piping Kitscobb716500-H](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-hot-side-piping-4175863.jpg?v=1770336214&width=220)
In StockCOBB Front Mount Intercooler Hot Side Piping
Fits: 15-21 STI
Only 12 leftRegular price $475.00Sale price $475.00 Regular priceUnit price per$475.00 -
![COBB [02 - 07 WRX , 04 - 21 STI , 04 - 08 FXT] MAP Sensor Adapter - JDMuscleEngine Management SensorscobbA12600](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-map-sensor-adapter-3505062.jpg?v=1770336259&width=220)
![COBB [02 - 07 WRX , 04 - 21 STI , 04 - 08 FXT] MAP Sensor Adapter - JDMuscleEngine Management SensorscobbA12600](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-map-sensor-adapter-3122976.jpg?v=1770336260&width=220)
In StockCOBB MAP Sensor Adapter
Fits: 02-07 WRX , 04-21 STI , 04-08 FXT
Only 9 leftRegular price $68.00Sale price $68.00 Regular priceUnit price per$68.00 -
![COBB [15 - 21 WRX/STI] Aluminum Radiator Shroud - Black - JDMuscleRadiator Shroudscobb815150](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-aluminum-radiator-shroud-black-3189958.jpg?v=1770336264&width=220)
![COBB [15 - 21 WRX/STI] Aluminum Radiator Shroud - Black - JDMuscleRadiator Shroudscobb815150](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-aluminum-radiator-shroud-black-6633435.jpg?v=1770336264&width=220)
In StockCOBB Aluminum Radiator Shroud - Black
Fits: 15-21 WRX/STI
Only 3 leftRegular price $125.00Sale price $125.00 Regular priceUnit price per$125.00 -
![Cobb [15 - 21 WRX/STI] Front Mount Intercooler Core Only Black - JDMuscleIntercoolerscobb716500-BK](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-front-mount-intercooler-core-only-black-4986627.jpg?v=1770336265&width=220)
![Cobb [15 - 21 WRX/STI] Front Mount Intercooler Core Only Black - JDMuscleIntercoolerscobb716500-BK](//jdmuscleusa.com/cdn/shop/files/cobb-15-21-wrxsti-front-mount-intercooler-core-only-black-8293062.jpg?v=1770336265&width=220)
In StockCobb Front Mount Intercooler Core Only Black
Fits: 15-21 WRX/STI
Only 7 leftRegular price $1,150.00Sale price $1,150.00 Regular priceUnit price per$1,150.00
![Cobb [15 - 21 WRX /STI] Front Mount Intercooler Core Only Silver - JDMuscleIntercoolerscobb716500-SL](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrx-sti-front-mount-intercooler-core-only-silver-4568232.jpg?v=1770336212&width=220)
![Cobb [15 - 21 WRX /STI] Front Mount Intercooler Core Only Silver - JDMuscleIntercoolerscobb716500-SL](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrx-sti-front-mount-intercooler-core-only-silver-3232981.jpg?v=1770336212&width=220)
![Cobb [15 - 21 STI] Front Mount Intercooler Cold Side Piping - JDMuscleIntercooler Piping Kitscobb716500-C](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-cold-side-piping-9040543.jpg?v=1770336213&width=220)
![Cobb [15 - 21 STI] Front Mount Intercooler Cold Side Piping - JDMuscleIntercooler Piping Kitscobb716500-C](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-cold-side-piping-4306361.jpg?v=1770336213&width=220)
![COBB [15 - 21 STI] Front Mount Intercooler Hot Side Piping - JDMuscleIntercooler Piping Kitscobb716500-H](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-hot-side-piping-1813470.jpg?v=1770336213&width=220)
![COBB [15 - 21 STI] Front Mount Intercooler Hot Side Piping - JDMuscleIntercooler Piping Kitscobb716500-H](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-sti-front-mount-intercooler-hot-side-piping-4175863.jpg?v=1770336214&width=220)
![COBB [02 - 07 WRX , 04 - 21 STI , 04 - 08 FXT] MAP Sensor Adapter - JDMuscleEngine Management SensorscobbA12600](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-map-sensor-adapter-3505062.jpg?v=1770336259&width=220)
![COBB [02 - 07 WRX , 04 - 21 STI , 04 - 08 FXT] MAP Sensor Adapter - JDMuscleEngine Management SensorscobbA12600](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-map-sensor-adapter-3122976.jpg?v=1770336260&width=220)
![COBB [15 - 21 WRX/STI] Aluminum Radiator Shroud - Black - JDMuscleRadiator Shroudscobb815150](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-aluminum-radiator-shroud-black-3189958.jpg?v=1770336264&width=220)
![COBB [15 - 21 WRX/STI] Aluminum Radiator Shroud - Black - JDMuscleRadiator Shroudscobb815150](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-aluminum-radiator-shroud-black-6633435.jpg?v=1770336264&width=220)
![Cobb [15 - 21 WRX/STI] Front Mount Intercooler Core Only Black - JDMuscleIntercoolerscobb716500-BK](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-front-mount-intercooler-core-only-black-4986627.jpg?v=1770336265&width=220)
![Cobb [15 - 21 WRX/STI] Front Mount Intercooler Core Only Black - JDMuscleIntercoolerscobb716500-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-15-21-wrxsti-front-mount-intercooler-core-only-black-8293062.jpg?v=1770336265&width=220)