Holley Lo-Ram Manifold Base and Fuel Rails Single Fuel Injector GM LS3/L93Holley Lo Ram Manifold Base and Fuel Rails Single Fuel Injector GM LS3 L93 Top feed Single Injector manifold and fuel rails only Satin Finish Overview The Holley LS3 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