
Description
The ACL Race Series Main Bearing Set (Part No. 1M2505H-STD-1) is designed for the Nissan Skyline VQ35HR, VQ37VHR, and GT-R R35 VR38DETT. Built for extreme performance, these tri-metal bearings provide excellent fatigue resistance, precise oil clearances, and reliable lubrication under high-RPM conditions. ACL is trusted by professional engine builders worldwide for strength, precision, and consistency.
Key Features and Benefits
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High-performance tri-metal construction
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Withstands extreme RPM conditions
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High-strength overlay plate with reduced thickness for fatigue resistance
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Hardened steel backs for improved support and retention
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Increased crush for superior fitment and stability
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No flash plating for improved heat transfer and grip in housing
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Increased eccentricity for bore distortion compensation and oil film stability
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3/4 grooved design for optimized load distribution and oil flow
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Tight wall tolerances for consistent clearances
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Enlarged ID chamfers for compatibility with performance crankshafts
Technical Specs / Material Info
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Size: STD-1
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Tunnel (mm): 69.993 – 70.017
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Shaft (mm): 64.951 – 64.975
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Max. Length: 20 mm
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Half Type: Upper & Lower
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Note: Set contains one pair of bearings (order required number of pairs)
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Weight: 0.09 kg
Vehicle Compatibility
Compatible with the following:
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Nissan Skyline VQ35HR DOHC 24v
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Nissan Skyline VQ37VHR DOHC 24v
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Nissan R35 GT-R VR38DETT DOHC 24v Twin Turbo
Package Contents
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One pair of ACL Race Series main bearings
Installation Notes
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Professional installation recommended
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Verify correct bearing grade selection before assembly
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Ensure proper clearance and lubrication during installation
Emissions & Compliance
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Not applicable (non-emissions-related component)
Documentation
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Technical Bulletin: Grade selection
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