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
-
Up to $50 off
In StockPLM Axle-Back Exhaust / Muffler Deletes V1 Poish / Titanium Tip
Fits: 15-21 WRX/STI
Only 8 leftRegular price From $349.00Sale price From $349.00 Regular priceUnit price per$350.00 -
Up to $13.20 off
In StockTial 44mm MVR External Wastegate - Universal
Regular price From $439.95Sale price From $439.95 Regular priceUnit price per$453.15 -
In StockGrimmSpeed Head to Exhaust Manifold Gaskets | Pair Suabru Turbo Models | 020001
Only 1 leftRegular price $40.00Sale price $40.00 Regular priceUnit price per$40.00 -
In StockRemark Mid Pipe Kit Resonated | RO-CPVA-C
Fits: 15-21 WRX/STI
Only 5 leftRegular price $855.00Sale price $855.00 Regular priceUnit price per$855.00 -
![Velossa Tech Design [15 - 21 WRX/STI] Big Mouth Ram Air Intake Snorkel *RGB Upgrade Available | VT - BM - 0228 - JDMuscleAir Intake DuctsVTDVT-BM-0228-Rec-RD-NRectangularRedNo](//jdmuscleusa.com/cdn/shop/files/velossa-tech-design-15-21-wrxsti-big-mouth-ram-air-intake-snorkel-rgb-upgrade-available-vt-bm-0228-9248696.png?v=1770321493&width=220)
![Velossa Tech Design [15 - 21 WRX/STI] Big Mouth Ram Air Intake Snorkel *RGB Upgrade Available | VT - BM - 0228 - JDMuscleAir Intake DuctsVTDVT-BM-0228-Rec-RD-NRectangularRedNo](//jdmuscleusa.com/cdn/shop/files/velossa-tech-design-15-21-wrxsti-big-mouth-ram-air-intake-snorkel-rgb-upgrade-available-vt-bm-0228-8798540.jpg?v=1770321493&width=220)
Velossa Tech Design Big Mouth Ram Air Intake Snorkel *RGB Upgrade Available | VT-BM-0228
Fits: 15-21 WRX/STI
Regular price From $179.00Sale price From $179.00 Regular priceUnit price per$179.00 -
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-6497348.jpg?v=1770336435&width=220)
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](//jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-3149936.jpg?v=1770336436&width=220)
In StockCobb Tuning TD05H-20G-8 Turbocharger
Fits: 02-07 WRX, 04-21 STI
Regular price $1,470.00Sale price $1,470.00 Regular priceUnit price per$1,470.00 -
![COBB [08 - 21 STI] Fuel Pressure Regulator Kit | 315200 - JDMuscleFuel Pressure Regulatorscobb315200](//jdmuscleusa.com/cdn/shop/products/cobb-08-21-sti-fuel-pressure-regulator-kit-315200-9296320.jpg?v=1770336560&width=220)
![COBB [08 - 21 STI] Fuel Pressure Regulator Kit | 315200 - JDMuscleFuel Pressure Regulatorscobb315200](//jdmuscleusa.com/cdn/shop/products/cobb-08-21-sti-fuel-pressure-regulator-kit-315200-1913435.jpg?v=1770336560&width=220)
In StockCobb Tuning Fuel Pressure Regulator Kit
Fits: 08-21 STI
Regular price $410.00Sale price $410.00 Regular priceUnit price per$410.00 -
![FactionFab [15-21 WRX/STI] Axle Back Exhaust Burnt Tip - Final Sale - JDMuscleAxle Back ExhaustsFFA1.10204.2](//jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrxsti-axle-back-exhaust-burnt-tip-final-sale-9310562.jpg?v=1781014102&width=220)
![FactionFab [15-21 WRX/STI] Axle Back Exhaust Burnt Tip - Final Sale - JDMuscleAxle Back ExhaustsFFA1.10204.2](//jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrxsti-axle-back-exhaust-burnt-tip-final-sale-7812463.jpg?v=1781014102&width=220)
FactionFab Axle Back Exhaust Burnt Tip - Final Sale
Fits: 15-21 WRX/STI
Regular price $476.40Sale price $476.40 Regular priceUnit price per$430.00 -
![PLM [15-21 WRX STI] Power Driven 3" Non Resonated Mid Pipe | PLM-SUB-MID-2015-NON-RES - JDMuscleExhaust Mid PipesPLM-SUB-MID-2015-NON-RES](//jdmuscleusa.com/cdn/shop/products/plm-15-21-wrx-sti-power-driven-3-non-resonated-mid-pipe-plm-sub-mid-2015-non-res-1673475.jpg?v=1786515610&width=220)
Up to $100 offPLM Power Driven 3" Non Resonated Mid Pipe | PLM-SUB-MID-2015-NON-RES
Fits: 15-21 WRX STI
Regular price $495.00Sale price $495.00 Regular priceUnit price per$595.00 -
In StockGrimmSpeed Radiator Hose Kit Red
Fits: 08-14 WRX, 08-21 STI, 09-13 FXT
Only 9 leftRegular price $148.00Sale price $148.00 Regular priceUnit price per$148.00 -
![GrimmSpeed [15-21 STI] StealthBox Cold Air Intake Red | 060078](//jdmuscleusa.com/cdn/shop/products/grm060078.jpg?v=1667333829&width=220)
![GrimmSpeed [15-21 STI] StealthBox Cold Air Intake Red | 060078](//jdmuscleusa.com/cdn/shop/products/grimmspeed-stealthbox-cold-air-intake-red-subaru-sti-2015-2020-060078-cold-air-intakes-grimmspeed-grm060078.jpg?v=1667292846&width=220)
In StockGrimmSpeed StealthBox Cold Air Intake Red | 060078
Fits: 15-21 STI
Only 1 leftRegular price $484.00Sale price $484.00 Regular priceUnit price per$484.00 -
In StockIAG Air / Oil Separator | AOS
Fits: 08-14 WRX & 08-21 STI
Only 1 leftRegular price $499.99Sale price $499.99 Regular priceUnit price per$499.99 -
In StockEOS 15-21 WRX / STi Muffler Delete Axle Back 4 Inch Quad Tips Exhaust
Only 1 leftRegular price $290.00Sale price $290.00 Regular priceUnit price per$249.98 -
![COBB [08 - 14 WRX, 08 - 21 STI] Silicone Radiator Hose Kit Black - JDMuscleRadiator HosescobbB22400-BK](//jdmuscleusa.com/cdn/shop/files/cobb-08-14-wrx-08-21-sti-silicone-radiator-hose-kit-black-5125754.jpg?v=1770328028&width=220)
In StockCobb Tuning Silicone Radiator Hose Kit - Black
Fits: 08-14 WRX, 08-21 STI
Regular price $121.00Sale price $121.00 Regular priceUnit price per$121.00 -
![Mishimoto [08 - 21 WRX/STI] Aluminum Coolant Overflow Tank - Polished | MMRT - STI - 08 - JDMuscleOverflow Tanks / Coolant Tank and AccessoriesMIMMRT-STI-08](//jdmuscleusa.com/cdn/shop/products/mishimoto-08-21-wrxsti-aluminum-coolant-overflow-tank-polished-mmrt-sti-08-8574580.png?v=1770329185&width=220)
![Mishimoto [08 - 21 WRX/STI] Aluminum Coolant Overflow Tank - Polished | MMRT - STI - 08 - JDMuscleOverflow Tanks / Coolant Tank and AccessoriesMIMMRT-STI-08](//jdmuscleusa.com/cdn/shop/products/mishimoto-08-21-wrxsti-aluminum-coolant-overflow-tank-polished-mmrt-sti-08-6197822.png?v=1770329185&width=220)
Up to $23.05 off
In StockMishimoto Aluminum Coolant Overflow Tank - Polished
Fits: 08-21 WRX/STI
Only 4 leftRegular price $233.95Sale price $233.95 Regular priceUnit price per$257.00 -
![Cobb [15 - 21 WRX/STI] Coolant Overflow Tank - JDMuscleOverflow Tanks / Coolant Tank and Accessoriescobb800660](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-coolant-overflow-tank-5416779.jpg?v=1770330618&width=220)
![Cobb [15 - 21 WRX/STI] Coolant Overflow Tank - JDMuscleOverflow Tanks / Coolant Tank and Accessoriescobb800660](//jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-coolant-overflow-tank-5682329.jpg?v=1770330619&width=220)
In StockCOBB Coolant Overflow Tank
Fits: 15-21 WRX/STI
Only 20 leftRegular price $290.00Sale price $290.00 Regular priceUnit price per$290.00
![Velossa Tech Design [15 - 21 WRX/STI] Big Mouth Ram Air Intake Snorkel *RGB Upgrade Available | VT - BM - 0228 - JDMuscleAir Intake DuctsVTDVT-BM-0228-Rec-RD-NRectangularRedNo](http://jdmuscleusa.com/cdn/shop/files/velossa-tech-design-15-21-wrxsti-big-mouth-ram-air-intake-snorkel-rgb-upgrade-available-vt-bm-0228-9248696.png?v=1770321493&width=220)
![Velossa Tech Design [15 - 21 WRX/STI] Big Mouth Ram Air Intake Snorkel *RGB Upgrade Available | VT - BM - 0228 - JDMuscleAir Intake DuctsVTDVT-BM-0228-Rec-RD-NRectangularRedNo](http://jdmuscleusa.com/cdn/shop/files/velossa-tech-design-15-21-wrxsti-big-mouth-ram-air-intake-snorkel-rgb-upgrade-available-vt-bm-0228-8798540.jpg?v=1770321493&width=220)
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-6497348.jpg?v=1770336435&width=220)
![Cobb [02 - 07 WRX, 04 - 21 STI] TD05H - 20G - 8 Turbocharger | E1120G - JDMuscleTurboscobbE1120G](http://jdmuscleusa.com/cdn/shop/products/cobb-02-07-wrx-04-21-sti-td05h-20g-8-turbocharger-e1120g-3149936.jpg?v=1770336436&width=220)
![COBB [08 - 21 STI] Fuel Pressure Regulator Kit | 315200 - JDMuscleFuel Pressure Regulatorscobb315200](http://jdmuscleusa.com/cdn/shop/products/cobb-08-21-sti-fuel-pressure-regulator-kit-315200-9296320.jpg?v=1770336560&width=220)
![COBB [08 - 21 STI] Fuel Pressure Regulator Kit | 315200 - JDMuscleFuel Pressure Regulatorscobb315200](http://jdmuscleusa.com/cdn/shop/products/cobb-08-21-sti-fuel-pressure-regulator-kit-315200-1913435.jpg?v=1770336560&width=220)
![FactionFab [15-21 WRX/STI] Axle Back Exhaust Burnt Tip - Final Sale - JDMuscleAxle Back ExhaustsFFA1.10204.2](http://jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrxsti-axle-back-exhaust-burnt-tip-final-sale-9310562.jpg?v=1781014102&width=220)
![FactionFab [15-21 WRX/STI] Axle Back Exhaust Burnt Tip - Final Sale - JDMuscleAxle Back ExhaustsFFA1.10204.2](http://jdmuscleusa.com/cdn/shop/products/factionfab-15-21-wrxsti-axle-back-exhaust-burnt-tip-final-sale-7812463.jpg?v=1781014102&width=220)
![PLM [15-21 WRX STI] Power Driven 3" Non Resonated Mid Pipe | PLM-SUB-MID-2015-NON-RES - JDMuscleExhaust Mid PipesPLM-SUB-MID-2015-NON-RES](http://jdmuscleusa.com/cdn/shop/products/plm-15-21-wrx-sti-power-driven-3-non-resonated-mid-pipe-plm-sub-mid-2015-non-res-1673475.jpg?v=1786515610&width=220)
![GrimmSpeed [15-21 STI] StealthBox Cold Air Intake Red | 060078](http://jdmuscleusa.com/cdn/shop/products/grm060078.jpg?v=1667333829&width=220)
![GrimmSpeed [15-21 STI] StealthBox Cold Air Intake Red | 060078](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-stealthbox-cold-air-intake-red-subaru-sti-2015-2020-060078-cold-air-intakes-grimmspeed-grm060078.jpg?v=1667292846&width=220)
![COBB [08 - 14 WRX, 08 - 21 STI] Silicone Radiator Hose Kit Black - JDMuscleRadiator HosescobbB22400-BK](http://jdmuscleusa.com/cdn/shop/files/cobb-08-14-wrx-08-21-sti-silicone-radiator-hose-kit-black-5125754.jpg?v=1770328028&width=220)
![Mishimoto [08 - 21 WRX/STI] Aluminum Coolant Overflow Tank - Polished | MMRT - STI - 08 - JDMuscleOverflow Tanks / Coolant Tank and AccessoriesMIMMRT-STI-08](http://jdmuscleusa.com/cdn/shop/products/mishimoto-08-21-wrxsti-aluminum-coolant-overflow-tank-polished-mmrt-sti-08-8574580.png?v=1770329185&width=220)
![Mishimoto [08 - 21 WRX/STI] Aluminum Coolant Overflow Tank - Polished | MMRT - STI - 08 - JDMuscleOverflow Tanks / Coolant Tank and AccessoriesMIMMRT-STI-08](http://jdmuscleusa.com/cdn/shop/products/mishimoto-08-21-wrxsti-aluminum-coolant-overflow-tank-polished-mmrt-sti-08-6197822.png?v=1770329185&width=220)
![Cobb [15 - 21 WRX/STI] Coolant Overflow Tank - JDMuscleOverflow Tanks / Coolant Tank and Accessoriescobb800660](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-coolant-overflow-tank-5416779.jpg?v=1770330618&width=220)
![Cobb [15 - 21 WRX/STI] Coolant Overflow Tank - JDMuscleOverflow Tanks / Coolant Tank and Accessoriescobb800660](http://jdmuscleusa.com/cdn/shop/products/cobb-15-21-wrxsti-coolant-overflow-tank-5682329.jpg?v=1770330619&width=220)