Perfect Circle MS590P Main Bearing Set Ford Small Block V8

The Perfect Circle MS590P is a high-performance main bearing set designed for Ford small block V8 engines including 221, 255, 260, 289, and 302 cubic inch (3.6L, 4.2L, 4.3L, 4.7L, 5.0L) applications from 1962-2001. Part of the renowned P-Series line, these bearings are engineered for demanding use in street performance, motorsports, and heavy-duty applications.

Key Features:

• Tri-metal construction with steel backing, copper-lead intermediate layer, and lead-tin-copper electroplated overlay
• High eccentricity and crush factor to compensate for high-load conditions and crankshaft distortion
• Extra-thin overlay design prevents overlay fatigue in high-revving engines
• Contains 1/2 grooved bearings for optimal oil distribution
• Standard size bearings for stock crankshaft journals
• Superior load capacity suitable as an upgrade from bi-metal bearings

Clevite (formerly Perfect Circle) has been an industry leader in engine bearing technology since 1948, with proven performance in both racing and street applications. These P-Series bearings deliver the versatility and reliability needed for most OE replacement applications while offering the strength to handle modified and performance builds.