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 StockWalbro 450lph In-Tank Fuel Pump E85 Version F90000267 - Universal
Regular price From $128.99Sale price From $128.99 Regular priceUnit price per$0.00 -
Up to $1.30 off
In StockCusco 12MM Exhaust Hanger
Fits: 08-21 WRX, 08-21 STI, 13-21 BRZ, 05-09 LGT, 08-11 Impreza
Regular price $11.70Sale price $11.70 Regular priceUnit price per$13.00 -
Up to $2.40 off
In StockBLOX Racing 60mm Exhaust Donut Subaru FA20/FA20DIT/EJ20/EJ25
Regular price $9.60Sale price $9.60 Regular priceUnit price per$12.00 -
In StockHKS 06-14 WRX / 04-21 STI Stainless Steel Equal Length Exhaust Manifold | 14019-AF002
Regular price $809.00Sale price $809.00 Regular priceUnit price per$809.00 -
In StockRemark Stainless Steel Axle Back w/ Single Wall 4 Inch Burnt Tips
Fits: 15-21 WRX/STI
Only 4 leftRegular price $695.00Sale price $695.00 Regular priceUnit price per$695.00 -
![Gates [06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT] Timing Kit w/ Water Pump | TCKWP328](//jdmuscleusa.com/cdn/shop/products/gates-timing-kit-w-water-pump-wrx-2006-2007-sti-2004-2019-legacy-gt-2005-2009-forester-xt-2004-2009-tckwp328-timing-belt-components-gates-gattckwp328.jpg?v=1614528230&width=220)
In StockGates Timing Kit w/ Water Pump | TCKWP328
Fits: 06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT
Only 11 leftRegular price $421.00Sale price $421.00 Regular priceUnit price per$421.00 -
Up to $4.05 offMishimoto Carbon Fiber Radiator Cap - Universal
Regular price $40.95Sale price $40.95 Regular priceUnit price per$45.00 -
![COBB [Subaru Models] Battery Tie Down - Black - JDMuscleBattery Tie Downs and Trayscobb800160](//jdmuscleusa.com/cdn/shop/products/cobb-subaru-models-battery-tie-down-black-8349438.jpg?v=1770329893&width=220)
![COBB [Subaru Models] Battery Tie Down - Black - JDMuscleBattery Tie Downs and Trayscobb800160](//jdmuscleusa.com/cdn/shop/products/cobb-subaru-models-battery-tie-down-black-9958604.jpg?v=1770329893&width=220)
In StockCOBB Battery Tie Down - Black
Fits: Subaru Models
Only 18 leftRegular price $77.00Sale price $77.00 Regular priceUnit price per$77.00 -
![Torque Solution [08 - 14 WRX, 08 - 21 STI] PNP Speed Density Kit - Stainless Bung | TS - WH - 499PS - JDMuscleEngine Management SensorstqsTS-WH-499PS](//jdmuscleusa.com/cdn/shop/products/torque-solution-08-14-wrx-08-21-sti-pnp-speed-density-kit-stainless-bung-ts-wh-499ps-5839578.jpg?v=1770330487&width=220)
Up to $17.10 off
In StockTorque Solution PNP Speed Density Kit - Stainless Bung
Fits: 08-14 WRX, 08-21 STI
Only 3 leftRegular price $84.00Sale price $84.00 Regular priceUnit price per$101.10 -
![Subaru OEM Intake Manifold to TGV Gasket [Most Subaru Models] | 14075AA161](//jdmuscleusa.com/cdn/shop/products/SUB14075AA161.jpg?v=1669935312&width=220)
Subaru OEM Intake Manifold to TGV Gasket | 14075AA161
Fits: Most Subaru Models
Regular price $9.88Sale price $9.88 Regular priceUnit price per$9.88 -
Up to $189 off
In StockTomei 11-21 WRX/STI FULL Titanium Muffler Expreme Ti Type-D
Only 5 leftRegular price $1,701.00Sale price $1,701.00 Regular priceUnit price per$1,890.00 -
![Extreme Online Store [15 - 21 WRX/STI] Resonated Mid - Pipe - JDMuscleExhaust Mid PipesEXT-MP011Subaru WRX / STi](//jdmuscleusa.com/cdn/shop/files/extreme-online-store-15-21-wrxsti-resonated-mid-pipe-4474303.jpg?v=1770326780&width=220)
![Extreme Online Store [15 - 21 WRX/STI] Resonated Mid - Pipe - JDMuscleExhaust Mid PipesEXT-MP011Subaru WRX / STi](//jdmuscleusa.com/cdn/shop/files/extreme-online-store-15-21-wrxsti-resonated-mid-pipe-1089119.jpg?v=1770326780&width=220)
EOS Resonated Mid-Pipe
Fits: 15-21 WRX/STI
Regular price $330.00Sale price $330.00 Regular priceUnit price per$289.98 -
![Cobb [08 - 14 WRX, 08 - 21 STI, 05 - 09 LGT] HIGH FLOW FUEL PUMP - JDMuscleFuel Pumps and AccessoriesCBT-315450](//jdmuscleusa.com/cdn/shop/files/cobb-08-14-wrx-08-21-sti-05-09-lgt-high-flow-fuel-pump-5483990.jpg?v=1770327073&width=220)
![Cobb [08 - 14 WRX, 08 - 21 STI, 05 - 09 LGT] HIGH FLOW FUEL PUMP - JDMuscleFuel Pumps and AccessoriesCBT-315450](//jdmuscleusa.com/cdn/shop/files/cobb-08-14-wrx-08-21-sti-05-09-lgt-high-flow-fuel-pump-3671235.jpg?v=1770327073&width=220)
In StockCobb HIGH FLOW FUEL PUMP
Fits: 08-14 WRX, 08-21 STI, 05-09 LGT
Regular price $193.00Sale price $193.00 Regular priceUnit price per$193.00 -
In StockGReddy 15-25 WRX / 15-21 STI Type-S Polished Radiator Cap | 13911004
Only 14 leftRegular price $23.75Sale price $23.75 Regular priceUnit price per$23.75 -
![GrimmSpeed [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] Intake Manifold to TGV Gasket Pair | 023001 - JDMuscleIntake System Gasketgrm023001](//jdmuscleusa.com/cdn/shop/files/grimmspeed-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-intake-manifold-to-tgv-gasket-pair-023001-4508665.jpg?v=1770327638&width=220)
GrimmSpeed Intake Manifold to TGV Gasket Pair | 023001
Fits: 02-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT
Regular price $29.00Sale price $29.00 Regular priceUnit price per$29.00 -
![Mishimoto [11 - 14 WRX, 11 - 21 STI] Ignition Coil Set of 4 | MMIG - STI - 1104 - JDMuscleCoil PacksmisMMIG-STI-1104](//jdmuscleusa.com/cdn/shop/products/mishimoto-11-14-wrx-11-21-sti-ignition-coil-set-of-4-mmig-sti-1104-4428028.png?v=1770331757&width=220)
![Mishimoto [11 - 14 WRX, 11 - 21 STI] Ignition Coil Set of 4 | MMIG - STI - 1104 - JDMuscleCoil PacksmisMMIG-STI-1104](//jdmuscleusa.com/cdn/shop/products/mishimoto-11-14-wrx-11-21-sti-ignition-coil-set-of-4-mmig-sti-1104-4586879.png?v=1770331757&width=220)
Up to $21.05 off
In StockMishimoto Ignition Coil Set of 4 | MMIG-STI-1104
Fits: 11-14 WRX, 11-21 STI
Regular price $214.95Sale price $214.95 Regular priceUnit price per$236.00
![Gates [06-07 WRX, 04-19 STI, 05-09 LGT, 04-09 FXT] Timing Kit w/ Water Pump | TCKWP328](http://jdmuscleusa.com/cdn/shop/products/gates-timing-kit-w-water-pump-wrx-2006-2007-sti-2004-2019-legacy-gt-2005-2009-forester-xt-2004-2009-tckwp328-timing-belt-components-gates-gattckwp328.jpg?v=1614528230&width=220)
![COBB [Subaru Models] Battery Tie Down - Black - JDMuscleBattery Tie Downs and Trayscobb800160](http://jdmuscleusa.com/cdn/shop/products/cobb-subaru-models-battery-tie-down-black-8349438.jpg?v=1770329893&width=220)
![COBB [Subaru Models] Battery Tie Down - Black - JDMuscleBattery Tie Downs and Trayscobb800160](http://jdmuscleusa.com/cdn/shop/products/cobb-subaru-models-battery-tie-down-black-9958604.jpg?v=1770329893&width=220)
![Torque Solution [08 - 14 WRX, 08 - 21 STI] PNP Speed Density Kit - Stainless Bung | TS - WH - 499PS - JDMuscleEngine Management SensorstqsTS-WH-499PS](http://jdmuscleusa.com/cdn/shop/products/torque-solution-08-14-wrx-08-21-sti-pnp-speed-density-kit-stainless-bung-ts-wh-499ps-5839578.jpg?v=1770330487&width=220)
![Subaru OEM Intake Manifold to TGV Gasket [Most Subaru Models] | 14075AA161](http://jdmuscleusa.com/cdn/shop/products/SUB14075AA161.jpg?v=1669935312&width=220)
![Extreme Online Store [15 - 21 WRX/STI] Resonated Mid - Pipe - JDMuscleExhaust Mid PipesEXT-MP011Subaru WRX / STi](http://jdmuscleusa.com/cdn/shop/files/extreme-online-store-15-21-wrxsti-resonated-mid-pipe-4474303.jpg?v=1770326780&width=220)
![Extreme Online Store [15 - 21 WRX/STI] Resonated Mid - Pipe - JDMuscleExhaust Mid PipesEXT-MP011Subaru WRX / STi](http://jdmuscleusa.com/cdn/shop/files/extreme-online-store-15-21-wrxsti-resonated-mid-pipe-1089119.jpg?v=1770326780&width=220)
![Cobb [08 - 14 WRX, 08 - 21 STI, 05 - 09 LGT] HIGH FLOW FUEL PUMP - JDMuscleFuel Pumps and AccessoriesCBT-315450](http://jdmuscleusa.com/cdn/shop/files/cobb-08-14-wrx-08-21-sti-05-09-lgt-high-flow-fuel-pump-5483990.jpg?v=1770327073&width=220)
![Cobb [08 - 14 WRX, 08 - 21 STI, 05 - 09 LGT] HIGH FLOW FUEL PUMP - JDMuscleFuel Pumps and AccessoriesCBT-315450](http://jdmuscleusa.com/cdn/shop/files/cobb-08-14-wrx-08-21-sti-05-09-lgt-high-flow-fuel-pump-3671235.jpg?v=1770327073&width=220)
![GrimmSpeed [02 - 14 WRX, 04 - 21 STI, 05 - 12 LGT, 04 - 13 FXT] Intake Manifold to TGV Gasket Pair | 023001 - JDMuscleIntake System Gasketgrm023001](http://jdmuscleusa.com/cdn/shop/files/grimmspeed-02-14-wrx-04-21-sti-05-12-lgt-04-13-fxt-intake-manifold-to-tgv-gasket-pair-023001-4508665.jpg?v=1770327638&width=220)
![Mishimoto [11 - 14 WRX, 11 - 21 STI] Ignition Coil Set of 4 | MMIG - STI - 1104 - JDMuscleCoil PacksmisMMIG-STI-1104](http://jdmuscleusa.com/cdn/shop/products/mishimoto-11-14-wrx-11-21-sti-ignition-coil-set-of-4-mmig-sti-1104-4428028.png?v=1770331757&width=220)
![Mishimoto [11 - 14 WRX, 11 - 21 STI] Ignition Coil Set of 4 | MMIG - STI - 1104 - JDMuscleCoil PacksmisMMIG-STI-1104](http://jdmuscleusa.com/cdn/shop/products/mishimoto-11-14-wrx-11-21-sti-ignition-coil-set-of-4-mmig-sti-1104-4586879.png?v=1770331757&width=220)