Clevite H-Series Main Bearings - 1/2 Groove - Standard Size - Tri Metal - SB Chevy - Small Journal - Set of 5 RS003C02 5257 works with late model

5257 works with late model Pyrometers with 10 pin connector on the back

1975-1985 Chevrolet G20

Fit 5/8" diameter valve stem hole for use with center reliefs and Schrader (Fill) valve (ALL44065)

90 Durometer

1969-1974 Chevrolet Blazer

Clevite H-Series Main Bearings - 1/2 Groove - Standard Size - Tri Metal - SB Chevy - Small Journal - Set of 5 RS003C02 5257 works with late modelClevite H Series performance bearings have a medium level of eccentricity, high crush, and a hardened steel back and thin overlay. These bearings are made without flash plating for better seating. Use H Series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range. Vehicle Applications: 1960 1962 Chevrolet C40 1960 1963 GMC 2500 Series 1960 1966 GMC 3000 1960 1967 Chevrolet K10 Pickup 1963 1967