2015-2021 Subaru STI Engine Parts & Upgrades
Shop 2015-2021 subaru sti engine parts and performance upgrades at JDMuscle. We carry the top brands with guaranteed fitment for your 2015-2021 Subaru STI.
2015-2021 Subaru STI Engine
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IAG Performance V2 Oil Pickup
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $149.99Sale price $149.99 Regular priceUnit price per$149.99 -
![Cobb [15 - 18 STI] SF Air Intake Box - JDMuscleAir Boxescobb715160](//jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-sf-air-intake-box-6970489.jpg?v=1770336370&width=220)
![Cobb [15 - 18 STI] SF Air Intake Box - JDMuscleAir Boxescobb715160](//jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-sf-air-intake-box-8990763.jpg?v=1770336371&width=220)
In StockCobb Tuning SF Air Intake Box
Fits: 15-18 STI
Regular price $260.00Sale price $260.00 Regular priceUnit price per$260.00 -
In StockCobb Tuning Subaru Oil Cap - Stealth Black
Fits: 15-26 WRX, 15-21 WRX STI, 13-26 BRZ, 02-14 Impreza, 04-13 Forester XT, 05-12 Legacy GT, 05-09 Outback XT, 20-25 Legacy XT/Sport, 20-26 Outback XT/Wilderness
Only 7 leftRegular price $96.00Sale price $96.00 Regular priceUnit price per$96.00 -
In StockCobb Tuning Turbo Blanket - Subaru EJ Stock
Fits: 02-14 WRX, 04-21 STI, 04-13 Forester XT, 05-09 Legacy GT, 05-09 Outback XT
Regular price $198.00Sale price $198.00 Regular priceUnit price per$198.00 -
In StockCobb Tuning Front Mount Intercooler Kit - Black
Fits: 15-21 STI
Only 4 leftRegular price $2,435.00Sale price $2,435.00 Regular priceUnit price per$2,435.00 -
Cobb Tuning Fuel System Upgrade Package
Fits: 08-21 STI
Regular price $1,903.00Sale price $1,903.00 Regular priceUnit price per$1,903.00 -
![Cobb [06 - 14 WRX, 04 - 21 STI, 06 - 09 Legacy GT/Outback XT, 06 - 13 Forester XT] 2in Up Pipe - JDMuscleTurbo Uppipescobb512260](//jdmuscleusa.com/cdn/shop/products/cobb-06-14-wrx-04-21-sti-06-09-legacy-gtoutback-xt-06-13-forester-xt-2in-up-pipe-5151324.jpg?v=1775590815&width=220)
Cobb Tuning 2in Up Pipe
Fits: 06-14 WRX, 04-21 STI, 06-09 Legacy GT/Outback XT, 06-13 Forester XT
Regular price $256.00Sale price $256.00 Regular priceUnit price per$256.00 -
In StockCobb Tuning Fuel Rails / Line Kit Package
Fits: 08-21 STI
Regular price $808.00Sale price $808.00 Regular priceUnit price per$808.00 -
![Cobb [Subaru / Mazda / Mitsubishi] EBCS 1/4inch EWG Fitting Kit | EWG - FITTING - UPGRADE - KIT - JDMuscleBoost Control SolenoidscobbEWG-FITTING-UPGRADE-KIT](//jdmuscleusa.com/cdn/shop/products/cobb-subaru-mazda-mitsubishi-ebcs-14inch-ewg-fitting-kit-ewg-fitting-upgrade-kit-6368460.jpg?v=1770336428&width=220)
In StockCobb Tuning EBCS 1/4" EWG Fitting Kit
Fits: 02-14 WRX, 04-21 STI, 04-13 Forester XT, 05-12 Legacy GT, 05-09 Outback XT, 04-13 Mazda, 08-15 Mitsubishi
Regular price $58.00Sale price $58.00 Regular priceUnit price per$58.00 -
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-9973074.jpg?v=1770336438&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-8795408.jpg?v=1770336438&width=220)
In StockCobb Tuning Turbo Heat Shield - Stainless Steel
Fits: 02-07 WRX, 04-21 STI, 04-08 Forester XT
Only 18 leftRegular price $101.00Sale price $101.00 Regular priceUnit price per$101.00 -
![Grimmspeed [08-21 WRX/STI] Lightweight Battery Mount Kit Red | grm121034 - JDMuscleBattery Tie Downs and Traysgrm121034](//jdmuscleusa.com/cdn/shop/products/grimmspeed-08-21-wrxsti-lightweight-battery-mount-kit-red-grm121034-2916803.jpg?v=1781013149&width=220)
![Grimmspeed [08-21 WRX/STI] Lightweight Battery Mount Kit Red | grm121034 - JDMuscleBattery Tie Downs and Traysgrm121034](//jdmuscleusa.com/cdn/shop/products/grimmspeed-08-21-wrxsti-lightweight-battery-mount-kit-red-grm121034-5184115.jpg?v=1781013149&width=220)
In StockGrimmspeed Lightweight Battery Mount Kit Red | grm121034
Fits: 08-21 WRX/STI
Only 5 leftRegular price $136.00Sale price $136.00 Regular priceUnit price per$136.00 -
Torque Solution TMIC Stud Kit WRX 2002-2007 / STI 2004-21 | TS-SU-TSK
Regular price $18.00Sale price $18.00 Regular priceUnit price per$18.00 -
![Moroso [02-07 WRX, 04-19 STI, 04-08 FXT] Aluminum Coolant Expansion Tank - JDMuscleOverflow / Expansion Tanksmor63784](//jdmuscleusa.com/cdn/shop/products/moroso-02-07-wrx-04-19-sti-04-08-fxt-aluminum-coolant-expansion-tank-8680274.jpg?v=1781013312&width=220)
In StockMoroso Aluminum Coolant Expansion Tank
Fits: 02-07 WRX, 04-19 STI, 04-08 FXT
Only 7 leftRegular price $220.99Sale price $220.99 Regular priceUnit price per$220.99 -
![Radium Engineering [08-21 WRX/STI, 05-09 LGT] V2 Fuel Hanger Plumbing Kit w/ Stainless Filter - JDMuscleFuel System Kitsrad20-0629-03](//jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgt-v2-fuel-hanger-plumbing-kit-w-stainless-filter-4925571.jpg?v=1781013619&width=220)
![Radium Engineering [08-21 WRX/STI, 05-09 LGT] V2 Fuel Hanger Plumbing Kit w/ Stainless Filter - JDMuscleFuel System Kitsrad20-0629-03](//jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgt-v2-fuel-hanger-plumbing-kit-w-stainless-filter-8152250.jpg?v=1781013618&width=220)
Up to $25 off
In StockRadium Engineering V2 Fuel Hanger Plumbing Kit w/ Stainless Filter
Fits: 08-21 WRX/STI, 05-09 LGT
Only 5 leftRegular price $474.95Sale price $474.95 Regular priceUnit price per$499.95 -
In StockGrimmspeed OVERTAKE BB500 Turbocharger Kit
Fits: 02-07 WRX, 04-21 STI
Only 1 leftRegular price $2,649.00Sale price $2,649.00 Regular priceUnit price per$2,649.00 -
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3090235.jpg?v=1781014153&width=220)
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](//jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3109086.jpg?v=1781014154&width=220)
Up to $12 off
In StockTomei Head Gasket .7mm Pair | TOMTA4070-SB02A
Fits: 06-14 WRX / 04-21 STI / 05-09 LGT
Only 4 leftRegular price $108.00Sale price $108.00 Regular priceUnit price per$120.00
![Cobb [15 - 18 STI] SF Air Intake Box - JDMuscleAir Boxescobb715160](http://jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-sf-air-intake-box-6970489.jpg?v=1770336370&width=220)
![Cobb [15 - 18 STI] SF Air Intake Box - JDMuscleAir Boxescobb715160](http://jdmuscleusa.com/cdn/shop/products/cobb-15-18-sti-sf-air-intake-box-8990763.jpg?v=1770336371&width=220)
![Cobb [06 - 14 WRX, 04 - 21 STI, 06 - 09 Legacy GT/Outback XT, 06 - 13 Forester XT] 2in Up Pipe - JDMuscleTurbo Uppipescobb512260](http://jdmuscleusa.com/cdn/shop/products/cobb-06-14-wrx-04-21-sti-06-09-legacy-gtoutback-xt-06-13-forester-xt-2in-up-pipe-5151324.jpg?v=1775590815&width=220)
![Cobb [Subaru / Mazda / Mitsubishi] EBCS 1/4inch EWG Fitting Kit | EWG - FITTING - UPGRADE - KIT - JDMuscleBoost Control SolenoidscobbEWG-FITTING-UPGRADE-KIT](http://jdmuscleusa.com/cdn/shop/products/cobb-subaru-mazda-mitsubishi-ebcs-14inch-ewg-fitting-kit-ewg-fitting-upgrade-kit-6368460.jpg?v=1770336428&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-9973074.jpg?v=1770336438&width=220)
![COBB [02 - 07 WRX, 04 - 21 STI, 04 - 08 FXT] Turbo Heat Shield | 512510 - JDMuscleExhaust Heat Shieldscobb512510](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-04-08-fxt-turbo-heat-shield-512510-8795408.jpg?v=1770336438&width=220)
![Grimmspeed [08-21 WRX/STI] Lightweight Battery Mount Kit Red | grm121034 - JDMuscleBattery Tie Downs and Traysgrm121034](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-08-21-wrxsti-lightweight-battery-mount-kit-red-grm121034-2916803.jpg?v=1781013149&width=220)
![Grimmspeed [08-21 WRX/STI] Lightweight Battery Mount Kit Red | grm121034 - JDMuscleBattery Tie Downs and Traysgrm121034](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-08-21-wrxsti-lightweight-battery-mount-kit-red-grm121034-5184115.jpg?v=1781013149&width=220)
![Moroso [02-07 WRX, 04-19 STI, 04-08 FXT] Aluminum Coolant Expansion Tank - JDMuscleOverflow / Expansion Tanksmor63784](http://jdmuscleusa.com/cdn/shop/products/moroso-02-07-wrx-04-19-sti-04-08-fxt-aluminum-coolant-expansion-tank-8680274.jpg?v=1781013312&width=220)
![Radium Engineering [08-21 WRX/STI, 05-09 LGT] V2 Fuel Hanger Plumbing Kit w/ Stainless Filter - JDMuscleFuel System Kitsrad20-0629-03](http://jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgt-v2-fuel-hanger-plumbing-kit-w-stainless-filter-4925571.jpg?v=1781013619&width=220)
![Radium Engineering [08-21 WRX/STI, 05-09 LGT] V2 Fuel Hanger Plumbing Kit w/ Stainless Filter - JDMuscleFuel System Kitsrad20-0629-03](http://jdmuscleusa.com/cdn/shop/products/radium-engineering-08-21-wrxsti-05-09-lgt-v2-fuel-hanger-plumbing-kit-w-stainless-filter-8152250.jpg?v=1781013618&width=220)
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3090235.jpg?v=1781014153&width=220)
![Tomei [06-14 WRX / 04-21 STI / 05-09 LGT] Head Gasket .7mm Pair | TOMTA4070-SB02A - JDMuscleHead GasketsTOMTA4070-SB02A](http://jdmuscleusa.com/cdn/shop/products/tomei-06-14-wrx-04-21-sti-05-09-lgt-head-gasket-7mm-pair-tomta4070-sb02a-3109086.jpg?v=1781014154&width=220)