Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Slim line design for when

Slim line design for when space is at a premium

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

don't cut corners

This upgraded combination elevates the standard in electronic fuel injection

and you can choose between plain polished

Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Slim line design for whenThese 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.