Chevy SBC 400 STD Main Bearings The shifters have stamped components

The shifters have stamped components to ensure smooth

The Speedmaster shift selector shaft is built with sturdy

They also offer the potential for improved fuel economy by making the engine more efficient

Speedmaster billet aluminum spacers provide the benefits of an open carburetor spacer

and regulator

Chevy SBC 400 STD Main Bearings The shifters have stamped componentsThese Speedmaster main 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.