Perfect Circle MS909F10 Small Block Chevy Main Bearing Set F-Series

The Perfect Circle MS909F10 is a high-quality crankshaft main bearing set designed specifically for small block Chevrolet engines. This F-Series bearing set provides reliable engine protection and performance for your SBC rebuild or restoration project.

Key Features:

• Complete main bearing set for small block Chevy applications
• F-Series construction designed for durability and longevity
• Precision-engineered for proper clearances and optimal oil flow
• Manufactured by Perfect Circle, a trusted name in engine components since 1895
• Professional-grade quality suitable for street or performance applications

Perfect Circle is now part of the MAHLE family of brands, which also includes Clevite bearings. These main bearings are manufactured to exacting standards to ensure proper fitment and reliable performance. The F-Series designation indicates these bearings are designed for standard duty applications, providing excellent conformability and wear resistance for rebuilt engines.