Clevite MS-829A-20 High Performance Main Bearing Set

The Clevite MS-829A-20 is a high-performance engine crankshaft main bearing set engineered for demanding applications. This bearing set utilizes advanced tri-metal construction with optimized bearing geometry to maximize oil film thickness and bearing longevity in performance engines.

Key Features:

• 180-degree upper shell grooving for optimal oil distribution to connecting rods
• Ungrooved lower shells to maximize oil film thickness and bearing life
• Tri-metal construction with hardened steel backing for superior strength
• Reduced overlay thickness to prevent overlay fatigue
• High crush design for maximum bearing retention
• Enlarged chamfers for increased crankshaft fillet clearance
• Non-flash plated for improved bearing seating

Engineering Design:

Clevite's extensive research into main bearing grooving demonstrates that a 180-degree groove in the upper shell provides the best overall performance. This design maintains critical oil supply to connecting rod bearings while preserving the oil film on the loaded lower shell. Extended grooving into the lower bearing half reduces performance by breaking up the protective oil film that separates the bearing from the shaft surface.

Application Notes:

This bearing set is ideal for high-performance and racing applications where maximum bearing durability is required. The design balances adequate oil flow to rod bearings with optimal oil film development in the main bearings. Suitable for medium to high RPM engines with proper crankshaft preparation and fillet radii.

Clevite engine bearings are manufactured to OE specifications and are trusted by professional engine builders and enthusiasts for their proven reliability in demanding applications.