101mm EFI Throttle Body Race Elbow 4500 Carb Flange for LS2 Series 4 Bolt Convert any one-piece GM TH400

Convert any one-piece GM TH400 case into a two-piece case with our Speedmaster TH400 case adapter

These Speedmaster Copper collector gaskets are about as close to blow-proof as you can get

ensure optimal performance and reliability

without spending an arm and a leg

These Speedmaster tailshaft housings are designed five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy

101mm EFI Throttle Body Race Elbow 4500 Carb Flange for LS2 Series 4 Bolt Convert any one-piece GM TH400These elbows are designed for use in high horsepower extreme race applications. An internal divider optimizes flow distribution to all ports of the manifold by reducing turbulence. Elbow has a LS2 Series 4 bolt pattern and is the best way to adapt a single throttle body to a Dominator 4500 style flange EFI manifold without sacrificing air flow. The throttle body flange accepts up to a 100mm throttle body.