Are you looking for a way to reduce high intake temperatures on your stock or modified 2015-2021 Subaru WRX? The solution is the Mishimoto direct-fit 2015-2021 Subaru WRX Race top-mount intercooler kit engineered specifically for your highly modified 2015-2021 Subaru WRX. The stock 2015-2021 Subaru WRX intercooler is prone to heat soak during repeated wide open throttle pulls and during track use. Mishimoto engineers spent months designing the 2015-2021 Subaru WRX parts and testing this top-mount intercooler to ensure optimum performance on your highly modified WRX. This intercooler utilizes durable cast aluminum end tanks TIG-welded to a highly efficient, dense bar-and-plate core. The Mishimoto 2015-2021 Subaru WRX intercooler has a 4? thick core and a total volume of 625 cubic inches, making it one of the largest top-mount intercoolers you can buy. Thanks to this volume and a very dense offset fin pitch, we are able to optimize heat transfer and support your vehicle from stock up to 500 whp. This WRX intercooler endured rigorous testing, showing a 35?F temperature drop as well as a 15 whp and 8 wtq bolt-on power increase for our test vehicle equipped with a Mishimoto 2015-2021 Subaru WRX downpipe and stage 2 EcuTek tune. Installation is simple, requires no modification to any parts in the engine bay, and can be completed in under 1 hour. Included with this top-mount intercooler is Mishimoto's innovative 2015-2021 Subaru WRX charge-pipe, utilizing a one-piece construction without the need for several couplers and clamps. An application-specific air splitter is included with the top-mount intercooler to help divert the maximum amount of air into your Mishimoto 2015-2021 Subaru WRX top-mount intercooler. The WRX top-mount intercooler kit also includes a new charge-pipe to intercooler hose, an intercooler to throttle body hose, and a new bypass valve hoses. These 2015-2021 Subaru WRX parts negate the need to gather supplies for installation, and they ensure years of reliable service.