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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In StockHKS 3 Layer Dry 200mm Green Replacement Filter Element
Fits: Universal
Regular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
Up to $22.60 off
In StockAEM DryFlow Air Filter Kit 4in x 7in DRYFLOW - Universal | 21-2057DK
Only 20 leftRegular price $50.39Sale price $50.39 Regular priceUnit price per$72.99 -
Up to $13.60 off
In StockAEM 2.75 inch Dryflow Air Filter with 9 inch Element - Universal | 21-2029DK
Only 12 leftRegular price $67.19Sale price $67.19 Regular priceUnit price per$80.79 -
![Perrin [16-17 STI] Cold Air Intake - Red | PSP-INT-323RD](//jdmuscleusa.com/cdn/shop/files/PSP-INT-323RD_01.jpg?v=1759363291&width=220)
![Perrin [16-17 STI] Cold Air Intake - Red | PSP-INT-323RD](//jdmuscleusa.com/cdn/shop/files/PSP-INT-323RD_02.jpg?v=1758562298&width=220)
Up to $102.50 off
In StockPerrin Cold Air Intake - Red | PSP-INT-323RD
Fits: 16-17 STI
Only 5 leftRegular price $307.50Sale price $307.50 Regular priceUnit price per$410.00 -
NRG Fender Washer Kit FW-200 Titanium Burn - Universal | FW-200TT
Regular price $44.00Sale price $44.00 Regular priceUnit price per$44.00 -
In StockNRG Classic White Wood Glowing Green Grain Steering Wheel - Universal | ST-015BK-GL
Only 6 leftRegular price $160.00Sale price $160.00 Regular priceUnit price per$160.00 -
Up to $0.69 off
In StockManley Round Wrist Pin Wire Lock Set WRX/STI Engine Models EJ20 / EJ25 2002-2019 | 42212-8
Only 3 leftRegular price $13.06Sale price $13.06 Regular priceUnit price per$13.75 -
In StockInjen Evolution Cold Air Intake
Fits: 15-17 STI
Only 5 leftRegular price $500.04Sale price $500.04 Regular priceUnit price per$500.04 -
GrimmSpeed MAF Block Off - WRX/STI / Forester XT 2002-21
Regular price From $62.00Sale price From $62.00 Regular priceUnit price per$62.00 -
Up to $34 off
In StockPerrin Post MAF Hose Black | PSP-INT-355
Fits: 08-14 WRX, 08-21 STI, 05-09 LGT
Only 16 leftRegular price $102.00Sale price $102.00 Regular priceUnit price per$136.00 -
![Torque Solution [02-07 WRX / 04-21 STI] HKS Blow Off Valve Adapter w/Plug | TS-SU-HKSC](//jdmuscleusa.com/cdn/shop/products/torque-solution-hks-bov-adapter-flange-w-plug-subaru-wrx-2002-2007-sti-2004-2019-blow-off-valve-flanges-torque-solution-tqsts-su-hksc.jpg?v=1614519348&width=220)
Up to $4.99 offTorque Solution HKS Blow Off Valve Adapter w/Plug | TS-SU-HKSC
Fits: 02-07 WRX / 04-21 STI
Regular price $45.00Sale price $45.00 Regular priceUnit price per$49.99 -
Up to $4.88 off
In StockTorque Solution VF Turbo Wastegate Bracket
Fits: 08-14 WRX, 04-21 STI
Only 3 leftRegular price $44.00Sale price $44.00 Regular priceUnit price per$48.88 -
In StockTurbo XS T Clamp Stainless Steel 74-80mm/2.91-3.14in - Universal
Regular price $15.00Sale price $15.00 Regular priceUnit price per$15.00 -
Subaru OEM Turbo Banjo Bolt with Screen Subaru STI 2004-2020 / WRX 2006-2014 | 14445AA090
Regular price $18.97Sale price $18.97 Regular priceUnit price per$18.97 -
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Blue | TB301A-SB01A](//jdmuscleusa.com/cdn/shop/files/tomei-silicone-turbo-inlet-hose-blue-2002-2007-wrx-2004-2021-sti-2004-2008-fxt-tb301a-sb01a-237363_556x417_34b0da4a-8a6c-4abb-b20e-88640a1ae4a0.jpg?v=1690926590&width=220)
Up to $19 off
In StockTomei Silicone Turbo Inlet Hose - Blue | TB301A-SB01A
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Only 5 leftRegular price $171.00Sale price $171.00 Regular priceUnit price per$190.00 -
Up to $83.25 off
In StockPerrin Turbo Inlet Hose 3in Black
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Regular price $249.75Sale price $249.75 Regular priceUnit price per$333.00
![Perrin [16-17 STI] Cold Air Intake - Red | PSP-INT-323RD](http://jdmuscleusa.com/cdn/shop/files/PSP-INT-323RD_01.jpg?v=1759363291&width=220)
![Perrin [16-17 STI] Cold Air Intake - Red | PSP-INT-323RD](http://jdmuscleusa.com/cdn/shop/files/PSP-INT-323RD_02.jpg?v=1758562298&width=220)
![Torque Solution [02-07 WRX / 04-21 STI] HKS Blow Off Valve Adapter w/Plug | TS-SU-HKSC](http://jdmuscleusa.com/cdn/shop/products/torque-solution-hks-bov-adapter-flange-w-plug-subaru-wrx-2002-2007-sti-2004-2019-blow-off-valve-flanges-torque-solution-tqsts-su-hksc.jpg?v=1614519348&width=220)
![Tomei [02-07 WRX, 04-21 STI, 04-08 FXT] Silicone Turbo Inlet Hose - Blue | TB301A-SB01A](http://jdmuscleusa.com/cdn/shop/files/tomei-silicone-turbo-inlet-hose-blue-2002-2007-wrx-2004-2021-sti-2004-2008-fxt-tb301a-sb01a-237363_556x417_34b0da4a-8a6c-4abb-b20e-88640a1ae4a0.jpg?v=1690926590&width=220)
