Perfect Circle MS909HC Coated H-Series Main Bearing Set

The Perfect Circle MS909HC is a coated H-Series crankshaft main bearing set designed for high-performance and racing applications. This bearing set features advanced coating technology that provides enhanced protection and reduced friction during engine operation.

Key Features:

• Steel backing construction with carefully selected overlays for maximum durability
• High crush factor ensures excellent heat transfer and resistance to rotation
• Medium level of eccentricity helps minimize rod housing bore deflection
• Advanced coating treatment provides superior lubricity and protection
• Enlarged chamfers at the sides for greater crank-fillet clearance
• Manufactured without flash plating for better seating characteristics
• Ideal for medium-to-high RPM performance engines

Perfect Circle H-Series bearings were originally developed for NASCAR racing applications and have proven themselves in the most demanding high-performance environments. The coated design offers extraordinary protection during startup and under high-load conditions, making these bearings an excellent choice for street performance, motorsports, and racing applications.