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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Deatschwerks Top Feed 750cc Bosch EV14 Fuel Injectors 2002-2014 WRX / 2007-2019 STI / 2007-2012 Legacy GT / Outback XT 2007-2009
Regular price $439.00Sale price $439.00 Regular priceUnit price per$439.00 -
In StockDeatschwerks DW300 High Flow In-Tank Fuel Pump & Install Kit - Universal
Only 2 leftRegular price $169.00Sale price $169.00 Regular priceUnit price per$169.00 -
Up to $140 offKiller B Motorsport 02-14 WRX / 04-21 STI 4-1 Holy Header Exhaust Manifold DIY Rotated | HH-DIY
Regular price $1,429.00Sale price $1,429.00 Regular priceUnit price per$1,569.00 -
Up to $112 off
In StockBorla Unequal Length Header WRX 2002-2014 / STI 2004-2019 | 17217
Only 5 leftRegular price $936.99Sale price $936.99 Regular priceUnit price per$1,048.99 -
Up to $89 off
In StockTomei Expreme 06-14 WRX / 04-21 STI Twin Scroll Exhaust Manifold Large Piping | TB6010-SB01A
Only 5 leftRegular price $801.00Sale price $801.00 Regular priceUnit price per$890.00 -
Up to $169 offMXP Comp RS Axle Back Exhaust | MXCRVAMD
Fits: 15-21 WRX/STI
Regular price $516.00Sale price $516.00 Regular priceUnit price per$685.00 -
In StockaFe Takeda 3inch Cat Back Exhaust w/ Polished Tips
Fits: 15-21 WRX/STI
Only 1 leftRegular price $1,852.00Sale price $1,852.00 Regular priceUnit price per$1,852.00 -
Up to $412.31 offCorsa Performance Catback Exhaust Stainless Steel Tips | 14857
Fits: 15-21 WRX/STI
Regular price $1,856.99Sale price $1,856.99 Regular priceUnit price per$2,269.30 -
Up to $428.31 off
In StockCorsa Performance Catback Exhaust Black Pro Series Tips
Fits: 15-21 WRX/STI
Only 6 leftRegular price $1,928.99Sale price $1,928.99 Regular priceUnit price per$2,357.30 -
In StockBrian Crower 6mm Exhaust Valve Guides WRX 2002-2014 /STI 2004-2019 Subaru Turbo Models
Only 1 leftRegular price $81.00Sale price $81.00 Regular priceUnit price per$81.00 -
Up to $291.20 offBLOX Racing Stainless Steel Catback Exhaust System | BXEX-51001
Fits: 15-21 WRX/STI
Regular price $1,164.80Sale price $1,164.80 Regular priceUnit price per$1,456.00 -
In StockTorque Solution Exhaust Hanger - Universal | Per Hanger
Regular price From $15.00Sale price From $15.00 Regular priceUnit price per$15.00 -
GrimmSpeed Pair Exhaust Manifold to Crosspipe Gasket - Subaru Turbo | 025001
Regular price $19.00Sale price $19.00 Regular priceUnit price per$19.00 -
GrimmSpeed 2X Thick Exhaust Manifold to Crosspipe Gasket - Subaru EJ Turbo | 077001
Regular price $27.00Sale price $27.00 Regular priceUnit price per$27.00 -
Grimmspeed 11-21 WRX Sedan / STI Sedan Resonated Cat Back Exhaust | 070033
Regular price $1,816.00Sale price $1,816.00 Regular priceUnit price per$1,816.00 -
Up to $774.80 off
In StockInvidia Q300 Cat Back Exhaust w/ Single Wall Stainless Steel Tips | HS15STIG2S
Fits: 15-21 WRX/STI
Only 1 leftRegular price $1,706.00Sale price $1,706.00 Regular priceUnit price per$2,480.80
