Holley Ultra Lo-Ram Manifold Kit Single Injector- Black - GM LS3/L92The Holley LS3 Ultra Lo Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS3 L92 cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Lo Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000 8000 rpm depending on the application. The front plenum flange has a 105 mm opening to work with throttle body