Chevy SBC 400 STD Main Bearings capable of withstanding valve spring

capable of withstanding valve spring load up to 600lbs

Replacement Spring Isolator for PC12004 A-Arms

not from sand molds

Speedmaster shirts are the perfect way to let everyone know where you go for high performance aftermarket parts and accessories

Chevy SBC 400 STD Main Bearings capable of withstanding valve springThese 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.