ACL race main bearings for the Nissan sr20det engine are manufactured with a tri-layer metal in order to withstand high RPM conditions, high stress loads, and high temperatures.  Each ACL race bearing design features the following:

ACL Race Main Bearing Set for Nissan SR20DET Engines Feature:

• Large chamfer to accomodate larger crankshaft fillets
• 3/4 groove main bearings to optimize bearing load carrying capacity and oil flow to rod bearings
• 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 main bearings.