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The Speedmaster 9" solid pinion bearing spacer kit is designed to retain the pinion depth settings for greater strength and reliability
They include all hardware for quick and easy installation
1966-72 (1973 non-CA) passenger cars
Fits big block Chevy rectangular port cylinder heads on standard deck blocks
along with energy-efficient and cost-effective friction management
Chevy SBC 400 STD Main Bearings The Speedmaster 9" solid pinionThese 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.
