This Clevite H-Series main bearing set is sold as a kit for the Oldsmobile V8 400/455. The set is 0.020 in undersize. H-Series performance bearings use a medium level of eccentricity, high crush, a hardened steel back and a thin overlay, and are made without flash plating for better seating. They are intended for engines that run in the medium to high RPM range.
Specifications:
- Type: Main bearing set (sold as a kit)
- Series: H-Series
- Size: 0.020 in undersize
- Engine: Oldsmobile V8 400/455
- Part number: MS804H20
Engine Application: Oldsmobile V8 400/455 (per the listing title). Confirm against your engine before ordering.
FAQ
What engine does the Clevite MS804H20 fit?
It is listed for the Oldsmobile V8 400/455. Confirm against your engine and crankshaft before ordering.
What does the MS804H20 part number mean?
It is a Clevite H-Series main bearing set in 0.020 in undersize. H-Series is Clevite's performance bearing line.
Is this sold as a kit or as individual bearings?
It is sold as a main bearing set (kit). One kit covers the engine's main journals, so order one kit per engine.
What does undersize mean?
Undersize bearings are made for crankshaft journals that have been machined smaller than stock. This set is 0.020 in undersize, so confirm your journal measurements before ordering.

