Chevy SBC 400 STD Main Bearings Ideal for vehicles with a

Ideal for vehicles with a long water pump and Type 2 power steering pump

The unique

along with energy-efficient and cost-effective friction management

Fits big block Chevy rectangular port cylinder heads on standard deck blocks

Chevy SBC 400 STD Main Bearings Ideal for vehicles with aThese 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.