HKS Super Turbo Exhaust (Twin Tail) - WRX STI VAB 53560-S04-013 Supplied with a replacement rocker

Supplied with a replacement rocker gasket

In order to confirm the best performance

drawer system etc

up to 15 hp and 18 ft-lb under 4k rpm

HKS Super Turbo Exhaust (Twin Tail) - WRX STI VAB 53560-S04-013 Supplied with a replacement rockerHKS specializes in aftermarket high performance parts and is perhaps the most well known aftermarket brand in the world. Formed in 1973, and named after the founders Hasegawa, Kitagawa, and Sigma, HKS began tuning engines and cars. Their vision was to tune and manufacture engine components that surpasses OE Manufacturers. They now produce some of the highest quality aftermarket parts on the market, with some of the most innovative design available.