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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IAG Performance Blemished EJ Competition Series Oil Pan | Black / Condition B09 | BLEM-ENG-2203BK-B09
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $599.99Sale price $599.99 Regular priceUnit price per$599.99 -
IAG Performance Blemished EJ Street Series Oil Pan | Black / Condition B07 | BLEM-ENG-2200BK-B07
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $479.99Sale price $479.99 Regular priceUnit price per$479.99 -
IAG Performance Blemished EJ Street Series Oil Pan | Black / Condition B09 | BLEM-ENG-2200BK-B09
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $499.99Sale price $499.99 Regular priceUnit price per$499.99 -
![Cobb [15 - 18 STI] NexGen Stage 2 + Flex Fuel Power Package - Blue - JDMuscleEngine Package DealscobbSUB004NG2S1FF-BL](//jdmuscleusa.com/cdn/shop/files/cobb-15-18-sti-nexgen-stage-2-flex-fuel-power-package-blue-6267490.jpg?v=1770327337&width=220)
![Cobb [15 - 18 STI] NexGen Stage 2 + Flex Fuel Power Package - Blue - JDMuscleEngine Package DealscobbSUB004NG2S1FF-BL](//jdmuscleusa.com/cdn/shop/files/cobb-15-18-sti-nexgen-stage-2-flex-fuel-power-package-blue-1891545.jpg?v=1770327338&width=220)
In StockCobb NexGen Stage 2 + Flex Fuel Power Package - Blue
Fits: 15-18 STI
Only 11 leftRegular price $4,415.00Sale price $4,415.00 Regular priceUnit price per$4,415.00 -
![Cobb [15 - 18 STI] NexGen Stage 2 + Flex Fuel Power Package - Black - JDMuscleEngine Package DealscobbSUB004NG2S1FF-BK](//jdmuscleusa.com/cdn/shop/files/cobb-15-18-sti-nexgen-stage-2-flex-fuel-power-package-black-7108830.jpg?v=1770327331&width=220)
In StockCobb NexGen Stage 2 + Flex Fuel Power Package - Black
Fits: 15-18 STI
Only 14 leftRegular price $4,415.00Sale price $4,415.00 Regular priceUnit price per$4,415.00 -
Up to $247.06 off
In StockMBRP 15-21 WRX 2.0L/STI 2.5L 3in Dual Split Rear Exit w/ 3.5" Tips - T304 | Street Version | S4800304
Only 5 leftRegular price $1,049.99Sale price $1,049.99 Regular priceUnit price per$1,297.05 -
Wiseco EJ257 WRX/STI 4v Dish -19cc 100mm Piston Shelf Stock | 6598M100
Regular price $216.99Sale price $216.99 Regular priceUnit price per$216.99 -
GReddy 02-14 WRX / 04-21 STI / 05-12 LGT / 04-13 FXT Timing Belt | 13564500
Regular price $258.00Sale price $258.00 Regular priceUnit price per$258.00 -
IAG Performance Replacement V3 AOS 20" Coolant Line & Fitting
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT
Regular price $49.99Sale price $49.99 Regular priceUnit price per$49.99 -
IAG AOS Strut Tower Mounting Bracket
Fits: 08-20 WRX/STI, 05-09 LGT
Regular price $39.99Sale price $39.99 Regular priceUnit price per$39.99 -
IAG Performance Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block
Fits: 02-14 WRX, 04-21 STi, 05-12 LGT, 04-13 FXT
Regular price $17,999.99Sale price $17,999.99 Regular priceUnit price per$17,999.99 -
Torque Solution 06-07 WRX / 04-21 STI Throttle Body Spacer Red | TS-TBS-027R
Regular price $78.00Sale price $78.00 Regular priceUnit price per$78.00 -
ACL 02-14 WRX / 04-21 STI Race Main Bearing Set Standard Size Position 3 | 5M8297H-STD
Regular price $122.88Sale price $122.88 Regular priceUnit price per$122.88 -
Cusco 15-21 STI Aluminium Belt Cover - Blue | 692-730-A
Regular price $117.90Sale price $117.90 Regular priceUnit price per$117.90 -
Torque Solution 06-07 WRX / 04-21 STI Throttle Body Spacer Silver | TS-TBS-027
Regular price $78.00Sale price $78.00 Regular priceUnit price per$78.00 -
Turbo XS 02-07 WRX / 04-21 STI RFL Series Recirculating Bypass Valve | TXS-WS-RBV
Regular price $249.99Sale price $249.99 Regular priceUnit price per$249.99
![Cobb [15 - 18 STI] NexGen Stage 2 + Flex Fuel Power Package - Blue - JDMuscleEngine Package DealscobbSUB004NG2S1FF-BL](http://jdmuscleusa.com/cdn/shop/files/cobb-15-18-sti-nexgen-stage-2-flex-fuel-power-package-blue-6267490.jpg?v=1770327337&width=220)
![Cobb [15 - 18 STI] NexGen Stage 2 + Flex Fuel Power Package - Blue - JDMuscleEngine Package DealscobbSUB004NG2S1FF-BL](http://jdmuscleusa.com/cdn/shop/files/cobb-15-18-sti-nexgen-stage-2-flex-fuel-power-package-blue-1891545.jpg?v=1770327338&width=220)
![Cobb [15 - 18 STI] NexGen Stage 2 + Flex Fuel Power Package - Black - JDMuscleEngine Package DealscobbSUB004NG2S1FF-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-15-18-sti-nexgen-stage-2-flex-fuel-power-package-black-7108830.jpg?v=1770327331&width=220)
