King Engine Bearings Datsun J15 (Size 0.25) Main Bearing Set

This is a main bearing set from King Engine Bearings, specifically sized at 0.25 inches undersize for Datsun J15 engines. These bearings are crucial components within your engine's rotating assembly, supporting the crankshaft as it spins. They are constructed with a bimetal design, featuring an aluminum base, which helps manage heat and wear effectively in this application.

When you're rebuilding an engine, especially one from a classic vehicle like the 1963-1967 Nissan 411, using well-made bearings is important for ensuring proper oil clearance and long-term reliability. This set is designed to fit the J15 engine, and the 0.25 undersize means it's intended for use with a crankshaft that has been machined down by 0.025 inches to correct for wear or runout.