Speed Pro Main Bearing - Standard - Small Block Chevy 139M Racing Suit lighter decreases your rotating weight

lighter decreases your rotating weight

205 lb/in Spring Rate

tube design provides ample exhaust flow to let your 283-400 SB Chevy engine breathe easy

Conventional Crossover

MSD Power Grid Ignition

Speed Pro Main Bearing - Standard - Small Block Chevy 139M Racing Suit lighter decreases your rotating weightSealed Power builds engine bearings using materials and alloys engineered for demanding applications. We tailor our bearings to withstand punishing racing conditions. Our bearings are proven winners in NHRA, NASCAR(R) and IHRA competition. Sealed Power engine bearings include a patented contoured flange design that increases thrust load capacity and a three quarter length oil groove that enhances lubricity without compromising load capacity. The