Clevite MS-1704A-20 Main Bearing Set

The Clevite MS-1704A-20 is a precision-engineered main bearing set designed for high-performance and racing applications. This bearing set features advanced TriMetal construction that combines strength, durability, and optimal lubrication characteristics for demanding engine builds.

Key Features:

• TriMetal bearing construction for superior strength and wear resistance
• Optimized 180-degree upper shell grooving for maximum oil film development
• Ungrooved lower shells provide thicker oil film and improved bearing life
• High crush design ensures maximum retention and stability
• Reduced overlay thickness prevents overlay fatigue
• Enlarged chamfers provide clearance for oversize crankshaft fillets
• No flash plating for improved seating characteristics

Engineering & Design:

Clevite main bearings utilize optimized grooving patterns based on extensive performance research. The 180-degree groove in the upper shell efficiently supplies oil to connecting rod bearings while maintaining optimal oil film thickness. The ungrooved lower shells, which experience higher loads, develop a thicker oil film that provides greater safety margins and extended bearing life compared to fully-grooved designs.

Performance Applications:

This bearing set is ideal for medium to high RPM racing engines, engine rebuilds requiring precise clearances, and applications demanding maximum durability under extreme loads. The design accommodates crankshafts with oversize fillets and provides excellent load distribution across the bearing surface.

Clevite performance bearings are engineered to meet the demanding requirements of competitive racing while providing the reliability needed for high-performance street applications. Proper installation includes verifying bearing crush, checking contact patterns, and ensuring appropriate oil clearances per manufacturer specifications.