Enhance the performance and durability of your Subaru STI 2015-2021 with top-notch cooling parts meticulously crafted by leading brands. From ETS and HKS to Perrin and Mishimoto, a spectrum of options awaits to elevate your driving experience. With offerings including Grimmspeed, Cobb, Subaru OEM, APR, and AMS, discover an array of air oil separators, intercooler shrouds, radiators, radiator accessories, and more. Elevate your vehicle's cooling efficiency and unleash its true potential on the road, ensuring optimal engine conditions and a smooth ride. Whether you seek intercooler upgrades, radiator caps, or radiator hoses, these premium components cater to your specific needs, catering to both performance enthusiasts and those valuing reliable, long-lasting automotive solutions.
Subaru STI 2015-2021 Cooling Parts
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![Koyo [08-21 WRX/STI] Radiator | VH091662](//jdmuscleusa.com/cdn/shop/products/vh091662.gif?v=1614327130&width=220)
![Koyo [08-21 WRX/STI] Radiator | VH091662](//jdmuscleusa.com/cdn/shop/products/koyo-radiator-subaru-wrx-sti-2008-2020-subaru-legacy-gt-2005-2009-manual-transmission-vh091662-radiators-koyo-cooling-koyvh091662-2.jpg?v=1614675210&width=220)
Up to $140.60 off
In StockKoyo Radiator
Fits: 08-21 WRX/STI
Regular price $425.00Sale price $425.00 Regular priceUnit price per$565.60 -
Up to $8.88 off
In StockTorque Solution Cylinder 4 Coolant Mod Line Kit
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT
Regular price $80.00Sale price $80.00 Regular priceUnit price per$88.88 -
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-black-grm090109.jpg?v=1614517802&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](//jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-3.jpg?v=1614658473&width=220)
In StockGrimmspeed Top Mount Intercooler Silicone Coupler Kit Black
Fits: 02-14 WRX / 04-21 STI
Only 2 leftRegular price $135.00Sale price $135.00 Regular priceUnit price per$135.00 -
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](//jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-2331844.jpg?v=1770332249&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](//jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-7878472.jpg?v=1770332250&width=220)
In StockHKS 1.1 Bar Limited Edition Radiator Cap
Fits: 02-26 WRX/STI, 13-21 BRZ/FRS/86
Regular price $42.00Sale price $42.00 Regular priceUnit price per$42.00 -
![Koyo [08-21 WRX/STI, 05-09 LGT] 13mm Coolant Reservoir Adapter - For Part VH091662 | PI-2183 - JDMuscleCoolant and AdditiveskoyPI-2183](//jdmuscleusa.com/cdn/shop/products/koyo-08-21-wrxsti-05-09-lgt-13mm-coolant-reservoir-adapter-for-part-vh091662-pi-2183-6118526.jpg?v=1781013553&width=220)
Up to $4.36 off
In StockKoyo 13mm Coolant Reservoir Adapter - For Part# VH091662 | PI-2183
Fits: 08-21 WRX/STI, 05-09 LGT
Only 2 leftRegular price $17.00Sale price $17.00 Regular priceUnit price per$21.36 -
![Compressive Tuning [22 - 25 WRX, 15 - 21 STI, 19+ Ascent /Outback/Legacy] AirShields - JDMuscleIntercooler ShroudsAS151-EJ-RD2015+ STiWrinkle Red](//jdmuscleusa.com/cdn/shop/products/compressive-tuning-22-25-wrx-15-21-sti-19-ascent-outbacklegacy-airshields-1132894.jpg?v=1770332118&width=220)
![Compressive Tuning [22 - 25 WRX, 15 - 21 STI, 19+ Ascent /Outback/Legacy] AirShields - JDMuscleIntercooler ShroudsAS151-EJ-BK2015+ STiWrinkle Black](//jdmuscleusa.com/cdn/shop/products/compressive-tuning-22-25-wrx-15-21-sti-19-ascent-outbacklegacy-airshields-7350340.jpg?v=1770332118&width=220)
Up to $14 offCompressive Tuning AirShields
Fits: 22-25 WRX, 15-21 STI, 19+ Ascent /Outback/Legacy
Regular price From $121.00Sale price From $121.00 Regular priceUnit price per$135.00 -
![Koyo [08-21 WRX/STI] 8mm Coolant Reservoir Adapter-For Part VH091662 - JDMuscleOverflow Tanks / Coolant Tank and AccessorieskoyPI-2182](//jdmuscleusa.com/cdn/shop/products/koyo-08-21-wrxsti-8mm-coolant-reservoir-adapter-for-part-vh091662-1575856.jpg?v=1781013553&width=220)
Up to $4.36 off
In StockKoyo 8mm Coolant Reservoir Adapter-For Part# VH091662
Fits: 08-21 WRX/STI
Only 3 leftRegular price $17.00Sale price $17.00 Regular priceUnit price per$21.36 -
Subaru OEM 1.3 Bar Radiator Cap Subaru All Models
Regular price $76.95Sale price $76.95 Regular priceUnit price per$76.95 -
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 -
![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
Regular price $290.00Sale price $290.00 Regular priceUnit price per$290.00 -
Up to $19.05 off
In StockMishimoto Aluminum Coolant Expansion Tank
Fits: 02-07 WRX, 04-21 STI
Only 9 leftRegular price $188.95Sale price $188.95 Regular priceUnit price per$208.00 -
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261 - JDMuscleIntercooler Installation Kitsgrm090261](//jdmuscleusa.com/cdn/shop/products/grimmspeed-15-21-wrxsti-bumper-bar-black-powder-090261-7439986.jpg?v=1783897824&width=220)
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261 - JDMuscleIntercooler Installation Kitsgrm090261](//jdmuscleusa.com/cdn/shop/products/grimmspeed-15-21-wrxsti-bumper-bar-black-powder-090261-5782082.jpg?v=1783897824&width=220)
In StockGrimmSpeed Bumper Bar Black Powder | 090261
Fits: 15-21 WRX/STI
Only 13 leftRegular price $285.00Sale price $285.00 Regular priceUnit price per$285.00 -
Up to $41.05 off
In StockMishimoto X-Line Aluminum Radiator
Fits: 08-14 WRX, 08-21 STI
Only 4 leftRegular price $409.95Sale price $409.95 Regular priceUnit price per$451.00 -
Up to $4.05 off
In StockMishimoto Carbon Fiber Radiator Cap - Universal
Only 6 leftRegular price $40.95Sale price $40.95 Regular priceUnit price per$45.00
![Koyo [08-21 WRX/STI] Radiator | VH091662](http://jdmuscleusa.com/cdn/shop/products/vh091662.gif?v=1614327130&width=220)
![Koyo [08-21 WRX/STI] Radiator | VH091662](http://jdmuscleusa.com/cdn/shop/products/koyo-radiator-subaru-wrx-sti-2008-2020-subaru-legacy-gt-2005-2009-manual-transmission-vh091662-radiators-koyo-cooling-koyvh091662-2.jpg?v=1614675210&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-black-grm090109.jpg?v=1614517802&width=220)
![Grimmspeed [02-14 WRX / 04-21 STI] Top Mount Intercooler Silicone Coupler Kit Black](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-top-mount-intercooler-silicone-hose-kit-subaru-wrx-2002-2007-sti-2004-2020-090108-090109-intercooler-hose-kits-grimmspeed-3.jpg?v=1614658473&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](http://jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-2331844.jpg?v=1770332249&width=220)
![HKS [02 - 25 WRX/STI, 13 - 21 BRZ/FRS/86] 1.1 Bar Limited Edition Radiator Cap | 15009 - AK004 - JDMuscleRadiator CapsHKS15009-AK004](http://jdmuscleusa.com/cdn/shop/products/hks-02-25-wrxsti-13-21-brzfrs86-11-bar-limited-edition-radiator-cap-15009-ak004-7878472.jpg?v=1770332250&width=220)
![Koyo [08-21 WRX/STI, 05-09 LGT] 13mm Coolant Reservoir Adapter - For Part VH091662 | PI-2183 - JDMuscleCoolant and AdditiveskoyPI-2183](http://jdmuscleusa.com/cdn/shop/products/koyo-08-21-wrxsti-05-09-lgt-13mm-coolant-reservoir-adapter-for-part-vh091662-pi-2183-6118526.jpg?v=1781013553&width=220)
![Compressive Tuning [22 - 25 WRX, 15 - 21 STI, 19+ Ascent /Outback/Legacy] AirShields - JDMuscleIntercooler ShroudsAS151-EJ-RD2015+ STiWrinkle Red](http://jdmuscleusa.com/cdn/shop/products/compressive-tuning-22-25-wrx-15-21-sti-19-ascent-outbacklegacy-airshields-1132894.jpg?v=1770332118&width=220)
![Compressive Tuning [22 - 25 WRX, 15 - 21 STI, 19+ Ascent /Outback/Legacy] AirShields - JDMuscleIntercooler ShroudsAS151-EJ-BK2015+ STiWrinkle Black](http://jdmuscleusa.com/cdn/shop/products/compressive-tuning-22-25-wrx-15-21-sti-19-ascent-outbacklegacy-airshields-7350340.jpg?v=1770332118&width=220)
![Koyo [08-21 WRX/STI] 8mm Coolant Reservoir Adapter-For Part VH091662 - JDMuscleOverflow Tanks / Coolant Tank and AccessorieskoyPI-2182](http://jdmuscleusa.com/cdn/shop/products/koyo-08-21-wrxsti-8mm-coolant-reservoir-adapter-for-part-vh091662-1575856.jpg?v=1781013553&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)
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261 - JDMuscleIntercooler Installation Kitsgrm090261](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-15-21-wrxsti-bumper-bar-black-powder-090261-7439986.jpg?v=1783897824&width=220)
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261 - JDMuscleIntercooler Installation Kitsgrm090261](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-15-21-wrxsti-bumper-bar-black-powder-090261-5782082.jpg?v=1783897824&width=220)
