Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] Speedmaster H-beam connecting rods are

Speedmaster H-beam connecting rods are perfect for supercharged and nitrous applications

While the GM 8

These are direct plug replacements for OEM coils

heat-treated to the highest Rockwell hardness available

Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] Speedmaster H-beam connecting rods areThese 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.