Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] These control arms are manufactured

These control arms are manufactured to strict tolerances to employ a great fit and exceptional performance

Couple this Hi-Ram intake with the high flowing LS1 style cylinder heads has outstanding potential for naturally aspirated and forced induction applications

This upgraded combination elevates the standard in electronic fuel injection

They are manufactured from machined steel and offer excellent valve spring location

to increase flow for more performance

Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] These control arms are manufacturedThese 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.