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 $157.60 off
In StockKoyo Radiator | VH091662
Fits: 08-21 WRX/STI
Regular price $408.00Sale price $408.00 Regular priceUnit price per$565.60 -
Up to $3.88 off
In StockTorque Solution Cylinder 4 Coolant Mod Line Kit | TS-SU-585
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-08 FXT
Only 15 leftRegular price $85.00Sale price $85.00 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
Regular price $135.00Sale price $135.00 Regular priceUnit price per$135.00 -
![Koyo [08-21 WRX/STI / 05-09 LGT] 13mm Coolant Reservoir Adapter - For Part# VH091662 | PI-2183](//jdmuscleusa.com/cdn/shop/products/0a521fe07adb60acbb0cd531b2f5a75f.jpg?v=1640723201&width=220)
Up to $5.36 off
In StockKoyo 13mm Coolant Reservoir Adapter - For Part# VH091662 | PI-2183
Fits: 08-21 WRX/STI, 05-09 LGT
Only 5 leftRegular price $16.00Sale price $16.00 Regular priceUnit price per$21.36 -
![Koyo [08-21 WRX/STI] 8mm Coolant Reservoir Adapter-For Part# VH091662 | PI-2182](//jdmuscleusa.com/cdn/shop/products/0a521fe07adb60acbb0cd531b2f5a75f_e8c5a814-672d-4983-88a6-40bc160ac185.jpg?v=1640723205&width=220)
Up to $5.36 off
In StockKoyo 8mm Coolant Reservoir Adapter-For Part# VH091662
Fits: 08-21 WRX/STI
Only 3 leftRegular price $16.00Sale price $16.00 Regular priceUnit price per$21.36 -
![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 $41.00Sale price $41.00 Regular priceUnit price per$41.00 -
![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 -
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](//jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd.jpg?v=1737769454&width=220)
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](//jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd-2.jpg?v=1737769454&width=220)
Up to $6.15 off
In StockPerrin Throttle Body Hose Red
Fits: 02-07 WRX, 04-21 STI
Only 10 leftRegular price $34.85Sale price $34.85 Regular priceUnit price per$41.00 -
Up to $21 offPerrin Upper Radiator Bracket Set Red | PSP-ENG-521
Fits: 08-21 WRX/STI
Regular price From $61.00Sale price From $61.00 Regular priceUnit price per$82.00 -
![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 Silicone Radiator Hose Kit Black
Fits: 08-14 WRX, 08-21 STI
Regular price $126.00Sale price $126.00 Regular priceUnit price per$126.00 -
![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 5 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 14 leftRegular price $290.00Sale price $290.00 Regular priceUnit price per$290.00 -
Subaru OEM 1.3 Bar Radiator Cap Subaru All Models | ST4511355010
Regular price $76.95Sale price $76.95 Regular priceUnit price per$76.95 -
Up to $19.05 off
In StockMishimoto Aluminum Coolant Expansion Tank
Fits: 02-07 WRX, 04-21 STI
Only 6 leftRegular price $188.95Sale price $188.95 Regular priceUnit price per$208.00 -
Up to $6.15 off
In StockPerrin Throttle Body Hose Black
Fits: 02-07 WRX, 04-21 STI
Regular price $34.85Sale price $34.85 Regular priceUnit price per$41.00 -
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261](//jdmuscleusa.com/cdn/shop/products/2344b210eff328397a098aa53be3b0e5.jpg?v=1636682467&width=220)
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261](//jdmuscleusa.com/cdn/shop/products/c172a1d06e4c0d34507c860f74c34858.jpg?v=1636682467&width=220)
In StockGrimmSpeed Bumper Bar Black Powder | 090261
Fits: 15-21 WRX/STI
Regular price $261.00Sale price $261.00 Regular priceUnit price per$261.00
![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)
![Koyo [08-21 WRX/STI / 05-09 LGT] 13mm Coolant Reservoir Adapter - For Part# VH091662 | PI-2183](http://jdmuscleusa.com/cdn/shop/products/0a521fe07adb60acbb0cd531b2f5a75f.jpg?v=1640723201&width=220)
![Koyo [08-21 WRX/STI] 8mm Coolant Reservoir Adapter-For Part# VH091662 | PI-2182](http://jdmuscleusa.com/cdn/shop/products/0a521fe07adb60acbb0cd531b2f5a75f_e8c5a814-672d-4983-88a6-40bc160ac185.jpg?v=1640723205&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)
![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)
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](http://jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd.jpg?v=1737769454&width=220)
![Perrin [02-07 WRX, 04-21 STI] Throttle Body Hose Red | PSP-ITR-301RD](http://jdmuscleusa.com/cdn/shop/products/perrin-top-mount-intercooler-coupler-red-subaru-wrx-2002-2007-sti-2004-2019-psp-itr-301rd-intercooler-hose-kits-perrin-performance-papsp-itr-301rd-2.jpg?v=1737769454&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](http://jdmuscleusa.com/cdn/shop/products/2344b210eff328397a098aa53be3b0e5.jpg?v=1636682467&width=220)
![GrimmSpeed [15-21 WRX/STI] Bumper Bar Black Powder | 090261](http://jdmuscleusa.com/cdn/shop/products/c172a1d06e4c0d34507c860f74c34858.jpg?v=1636682467&width=220)