Speed Pro Main Bearing - Standard - Small Block Chevy 139M Racing Suit tube design provides ample exhaust

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

Conventional Crossover

Color: White

GM Gen II/Mark IV Big Block V8 MLS Head Gasket 4

Speed Pro Main Bearing - Standard - Small Block Chevy 139M Racing Suit tube design provides ample exhaustSealed 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