Speed Pro Main Bearing - 0.010 in Undersize - Small Block Mopar 4101MEDBK Designed with Sprint cars in

Designed with Sprint cars in mind

1975-1978 Mazda RX-3

The fully radiused design gives optimal weight savings without sacrificing strength

1979-93 Mustang

1981-1999 Ford F-250

Speed Pro Main Bearing - 0.010 in Undersize - Small Block Mopar 4101MEDBK Designed with Sprint cars inSpeed Pro Main Bearing Set 120M10 Competition Series Main Bearings 0. 010" Undersize Tri Metal 3 4 Groove Chrysler 360 (Set of 5) Best bronze alloy material Does not have flash tin plating Extreme fatigue resistance & strength 3 4 Grooved Silicon particles help polish crankshaft journal (reduces wear during operation)From pistons to engine bearing components, Speed Pro offers an array of performance engine parts. You can rely on Speed Pro for industry