Chevy BBC 454 Chrome "454 Stamped" Steel Valve Covers - Tall w/ Baffled Hole 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

They utilize an open element design

The Speedmaster LowRise Manifolds are our lowest profile manifold and is also the only one that is street legal on pollution controlled vehicles

and 350 V8s with OEM carb or Edelbrock #1400 carb

and 3/8 in

Chevy BBC 454 Chrome "454 Stamped" Steel Valve Covers - Tall w/ Baffled Hole The Speedmaster throttle body beginsDress up your engine compartment without breaking the bank. These Speedmaster valve covers are an affordable and easy way to brighten up your engine.