Chevy SBC 350 Std Narrow Conrod Bearings (Large Journal & Large Radius Crank) Our dual plane big block

Our dual plane big block manifold is now available with rectangular ports

a new lower housing casting for enhanced fuel flow

This is our most popular manifold and is showing up on many performance street machines and street rods

They are designed to fit a variety of applications

and longevity

Chevy SBC 350 Std Narrow Conrod Bearings (Large Journal & Large Radius Crank) Our dual plane big blockThese Speedmaster connecting rod bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi metal construction. Silicon aluminum is the choice for many of today's engine manufacturers because of its high fatigue strength and superior temperature threshold. Bearing wear is dramatically reduced and the fatigue strength is greatly improved.