Perfect Circle MS909A Main Bearing Set for Small Block Chevy

The Perfect Circle MS909A is a high-quality engine crankshaft main bearing set designed for Small Block Chevrolet V8 engines, including 262, 267, 302, 305, 307, 327, and 350 cubic inch applications from 1967 to 1994. This complete set includes 5 main bearings engineered to deliver reliable performance and long-lasting durability.

Key Features:

• 100% lead-free aluminum silicon bi-metal construction for enhanced environmental safety
• 60% more silicon content than comparable bearings for superior journal surface conditioning
• 1/2 groove design with standard size AL-5 specification
• Excellent seizure and wear resistance for demanding engine conditions
• Softer, more conformable aluminum backing ideal for cast crankshaft applications
• Proven Clevite engineering with carefully calibrated eccentricities for optimal fit

Perfect for OEM-style engine rebuilds and mild performance applications, this main bearing set maintains engine health and ensures smooth operation. Compatible with a wide range of GM vehicles including Chevrolet, GMC, Buick, Cadillac, and Pontiac models. Ideal for both professional mechanics and DIY enthusiasts tackling engine rebuilds.