Max horsepower capacity: 500HP+. Rocker Valve Cover & Gasket Kit For BMW E90 E91 E92 E93 F20 F21 F31 8581798. 5" Thickness core (approx. 2" thicker than the standard intercooler) Stepped design. Turbo Intercooler Kit For BMW F20 F21 F23 F30 F31 F34 Upgraded Front Mount.
