ISR Performance O2 Sand Cast Turbine Outlet - Nissan SR20DET 0 06 May 2016 16:39 Enjuku Racing ISR Performance O2 Sand Cast Turbine Outlet - Nissan SR20DET Factory Nissan SR20DET O2 housing are extremely restrictive, ISR Performance Cast 3" O2 Housing are substantially larger allowing the exh..Price: $169.99