Xcessive’s all new cast lower intake manifold for the 20B is based on the same concept as our original 13B-REW manifold, better runner flow balance, more volume and more fuel. We’ve made these manifolds with 6 injector bosses machined to fit Bosch type top feed injectors with 14mm o-rings without any adapters. We’ve placed all the injectors on the inside of the manifold to keep them away from heat leaving more room on the outside for turbo motors as well as a cleaner install.
The new lower manifold fits stock upper castings and comes in both a full height (stock) and short versions. This is the short version that is 1 1/2″ (38mm) shorter than stock.