ACL Bearings 8B663HD-001 Race Series Rod Bearing Set .001 Oversize with Dowel Hole

ACL Race Series connecting rod bearings are engineered for high-performance race engines that demand superior durability and precision under extreme conditions. The 8B663HD features a dowel hole in the lower shell to suit aluminum connecting rods, making it ideal for performance engine builds using aftermarket components.

Key Features:

• Tri-metal construction with lead, tin, copper and nickel for superior strength and seizure resistance
• .001" oversize for tighter oil clearance and precise engine assembly
• Enlarged chamfers provide clearance for most aftermarket crankshaft fillet radii
• Dowel hole location in lower shell for aluminum connecting rod applications
• High-strength overlay plate with reduced thickness for improved fatigue properties
• Increased eccentricity improves shape adaptation to compensate for bore distortion at high speed operation

Technical Specifications:

• Bearing Size: .001" oversize
• Maximum overall length: 21.25mm (0.837")
• Minimum standard shaft size: 2.099" / 53.315mm
• Maximum shaft size: 53.34mm (2.100")
• Bearing Material: Tri-metal with steel backing

Applications:

• Small Block Chevy: 262, 267, 302, 305, 307, 327, 350, 400 V8
• GM LS Series: 4.8L, 5.3L, 5.7L Gen III, 6.0L engines
• Chevrolet LS1, LS2, LS3, LS6, LS7, LSA, L99, LFA engines

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, trusted by engine builders for record-setting and championship-winning race engines. The precision manufacturing ensures reliable fit and consistent clearances critical for high-RPM operation.