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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Up to $52.52 off
In StockGo Fast Bits Deceptor Pro II Electronically Adjustable Blow Off Valve | T9503
Fits: 02-07 WRX, 04-21 STI, 06-08 FXT
Only 5 leftRegular price $472.68Sale price $472.68 Regular priceUnit price per$525.20 -
In StockHKS 08-21 STI Suction Return Kit | 71002-AF002
Only 5 leftRegular price $43.00Sale price $43.00 Regular priceUnit price per$43.00 -
Up to $114.40 offPerrin Black Air Oil Separator Subaru 2008-2014 WRX / 2002-2020 STI with Top Mount Intercooler | PSP-ENG-606BK
Regular price $457.60Sale price $457.60 Regular priceUnit price per$572.00 -
Killer B Air / Oil Separator w/ Plumbing WRX 2008-2014 / STI 2008-2020 | GR-MV3S-C
Regular price $505.00Sale price $505.00 Regular priceUnit price per$505.00 -
![Cusco [15-21 STI] Oil Catch Can | 6A1-009-A](//jdmuscleusa.com/cdn/shop/products/cusco-oil-catch-can-subaru-sti-2015-2019-catch-cans-cusco-cus6a1-009-a.jpg?v=1614512276&width=220)
![Cusco [15-21 STI] Oil Catch Can | 6A1-009-A](//jdmuscleusa.com/cdn/shop/products/cusco-oil-catch-can-subaru-sti-2015-2019-catch-cans-cusco-cus6a1-009-a-2.jpg?v=1614673545&width=220)
Up to $17.50 off
In StockCusco Oil Catch Can | 6A1-009-A
Fits: 15-21 STI
Only 8 leftRegular price $157.50Sale price $157.50 Regular priceUnit price per$175.00 -
Up to $28.35 off
In StockCometic 08-21 STI Street Pro Gasket Kit | PRO2048C
Only 1 leftRegular price $376.74Sale price $376.74 Regular priceUnit price per$405.09 -
Up to $36.32 off
In StockCometic 100mm Bore Head Gasket WRX/STI EJ25 Models
Only 9 leftRegular price From $51.84Sale price From $51.84 Regular priceUnit price per$54.85 -
In StockWiseco Piston Set 100mm Bore WRX 2006-2014 / STI 2004-2020 Subaru Turbo Models
Only 2 leftRegular price $873.99Sale price $873.99 Regular priceUnit price per$873.99 -
Royal Purple Ultra Performance Grease - Universal
Regular price $20.00Sale price $20.00 Regular priceUnit price per$20.00 -
In StockBrian Crower Intake Valves WRX 2002-2014 / STI 2004-2019
Only 6 leftRegular price From $147.81Sale price From $147.81 Regular priceUnit price per$0.00 -
Up to $4.99 offTorque Solution Spark Plug Gap Tool w/ Feeler Gauge 14mm - Universal
Regular price $42.00Sale price $42.00 Regular priceUnit price per$46.99 -
In StockDeatschWerks DW200 Fuel Pump - Universal
Regular price $109.00Sale price $109.00 Regular priceUnit price per$109.00 -
![Torque Solution [02-14 WRX, 07-21 STI, 07-12 LGT, 06-13 FXT] Braided Fuel Line Kit for -6 Aeromotive FPR | TS-SU-6FLK-AM](//jdmuscleusa.com/cdn/shop/products/torque-solution-braided-fuel-line-kit-for-6-aeromotive-fpr-subaru-wrx-02-14-sti-07-19-fuel-lines-and-fittings-torque-solution-tqsts-su-6flk-am.jpg?v=1614518853&width=220)
Up to $30.55 off
In StockTorque Solution Braided Fuel Line Kit for -6 Aeromotive FPR | TS-SU-6FLK-AM
Fits: 02-14 WRX, 07-21 STI, 07-12 LGT, 06-13 FXT
Only 10 leftRegular price $225.00Sale price $225.00 Regular priceUnit price per$255.55 -
In StockWalbro 255LPH Fuel Pump Only - Universal
Regular price $76.00Sale price $76.00 Regular priceUnit price per$76.00 -
In StockInjector Dynamics Denso USCAR PnP Injector Adapter - Universal
Only 4 leftRegular price $17.33Sale price $17.33 Regular priceUnit price per$17.33 -
Injector Dynamics ID1050X Top Feed Injectors + Adapters + Deatschwerks 300C Fuel Pump WRX 2008-2014 / STI 2008-2019
Regular price $757.00Sale price $757.00 Regular priceUnit price per$0.00
![Cusco [15-21 STI] Oil Catch Can | 6A1-009-A](http://jdmuscleusa.com/cdn/shop/products/cusco-oil-catch-can-subaru-sti-2015-2019-catch-cans-cusco-cus6a1-009-a.jpg?v=1614512276&width=220)
![Cusco [15-21 STI] Oil Catch Can | 6A1-009-A](http://jdmuscleusa.com/cdn/shop/products/cusco-oil-catch-can-subaru-sti-2015-2019-catch-cans-cusco-cus6a1-009-a-2.jpg?v=1614673545&width=220)
![Torque Solution [02-14 WRX, 07-21 STI, 07-12 LGT, 06-13 FXT] Braided Fuel Line Kit for -6 Aeromotive FPR | TS-SU-6FLK-AM](http://jdmuscleusa.com/cdn/shop/products/torque-solution-braided-fuel-line-kit-for-6-aeromotive-fpr-subaru-wrx-02-14-sti-07-19-fuel-lines-and-fittings-torque-solution-tqsts-su-6flk-am.jpg?v=1614518853&width=220)
