Chrysler Mopar BB 413 426 440 HiRise Aluminum Intake Manifold [Satin] The Speedmaster throttle body begins

The Speedmaster throttle body begins as a billet of 6061- T6 aluminum for superior quality and is introduced to a state-of-the-art CNC machine

Impala and Buick Roadmaster

These rods incorporate a special doweled cap for specific cap-to-rod alignment and are profiled with extra clearance for stroker applications

Couple this Hi-Ram intake with the high flowing LS3 style cylinder heads has outstanding potential for naturally aspirated and forced induction applications

and header clearance

Chrysler Mopar BB 413 426 440 HiRise Aluminum Intake Manifold [Satin] The Speedmaster throttle body beginsStep up to the high rpm power of an open plenum with Speedmaster HiRise intake manifolds. These cast aluminum manifolds accept square bore carburetors and are pressure tested to ensure maximum performance. They start to make awesome power around 3,000 rpm.