ACL Race Series Main Bearings for Toyota 1JZ / 2JZ - Standard Size (7M8103H-STD)

ACL Race Series Main Bearings (7M8103H-STD) provide extreme durability for Toyota 1JZ-GTE, 2JZ-GTE, and 2JZ-GE crankshaft journals. Designed for high-rpm and high-load competition engines, these tri-metal bearings maintain consistent oil film clearance under intense combustion pressures.

Manufactured with copper-lead intermediate layers and hardened steel backings, ACL Race main bearings feature enlarged oil grooves and precision wall tolerances to maximize lubrication flow and resist journal scuffing.

Key Features & Benefits:

• Tri-Metal Metallurgy: Hardened steel backing with copper-lead intermediate layer for maximum load capacity.
• Enlarged Oil Grooves: Optimizes lubrication film strength to prevent journal scuffing at high RPM.
• Precision Clearance: Exact wall thickness tolerances ensure reliable fitment and consistent oil pressure.

Technical Specifications:

• Material / Build: Main Bearings
• Warranty: Official Manufacturer Limited Warranty
• Brand: ACL Performance