ACL Race Bearings - Mains (Nissan SR20DET GTiR) | Niced Up

Upgrade your bottom end with the ACL Race Series Main Bearings Set (Part # 5M2975H-STD) engineered specifically for Nissan SR20DET GTiR (RNN14 Pulsar) engines. Designed with 5 oil holes in the upper bearing shells, ACL Race Series main bearings are manufactured to exacting tolerances with particular attention paid to wall thickness accuracy, ensuring a reliable fit and maintaining consistent oil clearances under high-load turbo conditions.

Featuring high-strength trimetal copper-lead construction with hardened steel backing and no flash plating, these bearings deliver superior fatigue resistance and thermal conductivity required for aggressive boost pressures.

Key Features & Benefits:

• GTi-R Specific 5-Hole Design: Engineered with 5 upper oil feed holes specifically matching the RNN14 Pulsar GTi-R oiling system.
• Trimetal Construction: High load capacity copper-lead structure with galvanic overlay for exceptional wear and seizure resistance.
• Precision Tolerances: Strict wall thickness control maintains precise oil clearances for optimal journal lubrication under extreme boost.

Technical Specifications:

• Bearing Type: Main Engine Bearings (Standard Size - STD)
• Oiling Configuration: 5 Oil Holes in Upper Shells (GTi-R Specific)
• Material: Tri-Metal Alloy (Copper-Lead / Steel Backed)
• Warranty: ACL Performance Limited Manufacturer Warranty
• Brand: ACL Performance