Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] Speedmaster rock-solid race shifting Billet

Speedmaster rock-solid race shifting Billet Street automatic shifters can give your street ride the feel of having a full-on race stick in your hand

They are made of aluminum and feature a natural finish

Let everyone know you take high performance seriously by flying the Speedmaster name and colors on a Speedmaster Flag

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

Their strong die-cast aluminum design ensures an excellent gasket seal and dissipates heat better than many other covers

Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] Speedmaster rock-solid race shifting BilletThese 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.