South Side Performance Aluminum Upper Plenum Spacer Kit Nissan R35 GTR 09+

South Side Performance, 1/2" thick Upper Plenum Spacers. It has been dyno proven to outperform aftermarket manifold plenums, increases plenum volume, lowers intake air temperatures, allows front cylinders to breathe more efficiently, 10+ horsepower gains to the wheels, and increased throttle response. They are made from precision- water jet cut aluminum, and offering increasing power by keeping the upper plenum and charge air temperatures lower. Your engine will retain its factory appearance. Easy installation, includes all hardware, along with South Side Performance’s 30 Day Warranty.