ACL race bearings are manufactured with a tri-layer metal with a hardened steel backing in order to withstand high RPM conditions, high stress loads, and high temperatures. Each ACL race bearing design features the following: *Large chamfer to accomodate larger crankshaft fillets
*3/4 groove to provide optimum oil supply to rods and to maximize load carrying capacity
*Incresed crush and tighter wall tolerance for better seating
*Improved overlay and reduced thickness for increased fatigue strength
*Hardened steel backing to maintain crush under high loads and temperatures Price is for One complete set of engine bearings.