Mishimoto’s top-mount intercooler for 2008–2014 Subaru WRX STI uses cast-aluminum end tanks mated to a dense bar-and-plate core (3.75" thick, 584 in3) to improve heat transfer for street and track use. Tested to yield a 10°F intake temperature drop and small bolt-on power and torque gains, the kit includes gaskets and silicone couplers for a straightforward swap into the stock location.
Mishimoto Subaru 08-15 WRX STi Top-Mount Intercooler Kit - Powder Coated Silver & Red Hoses