ACL Bearings 8B1442H-.25 Race Series Rod Bearing Set 0.25mm Oversize

ACL Bearings 8B1442H-.25 Race Series Connecting Rod Bearing Set

The ACL Race Series 8B1442H-.25 connecting rod bearing set is engineered specifically for Ford 4.6L SOHC and 5.4L V8 modular engines. This 0.25mm oversize bearing set is designed for high-performance and racing applications where precision fitment and exceptional durability are critical to engine survival.

Race-Proven Performance

ACL Race Series bearings are recognized throughout the motorsports world as premier performance engine bearings. These rod bearings are standard components in race engines that have set records and won championships from sport compact drift racing to NASCAR, IHRA, and NHRA competitions. The unique combination of design, metallurgy, and engineering provides Race Series bearings with the endurance and capability to perform where others cannot.

Advanced Engineering Features

• High-Strength Overlay: Reduced thickness overlay plate delivers improved fatigue properties under extreme loads and high RPM operation
• Hardened Steel Backs: All rod bearings feature hardened steel backs to improve support of the bearing lining and assist with bearing retention in the housing
• Enhanced Heat Transfer: Flash plating eliminated on bearing backs to improve heat transfer and maximize grip between bearings and housing
• Increased Eccentricity: Compensates for bore distortion at high RPM and assists in formation of hydrodynamic oil films
• Tight Wall Tolerances: Consistent manufacturing tolerances help maintain proper bearing clearances
• Enlarged ID Chamfers: Bearing edges feature enlarged chamfers where required to accommodate large fillet radius on performance crankshafts
• Tri-Metal Construction: Advanced tri-metal design provides superior load-carrying capacity and wear resistance

0.25mm Oversize Application

The -.25 designation indicates these bearings are 0.25mm oversize, designed for engine rebuilds where the crankshaft journals have been machined to restore proper surface finish and geometry. This oversize dimension ensures precise fitment and correct bearing clearances in modified or rebuilt engines.

Specifications

• Application: Ford 4.6L SOHC / 5.4L V8 Modular Engines
• Bearing Size: 0.25mm Oversize
• Series: ACL Race Series (H-Series)
• Construction: Tri-Metal with hardened steel backing
• Quantity: Complete 8-cylinder bearing set

Recommended Applications

These bearings are ideal for high-performance street engines, forced induction applications, and dedicated race engines operating at elevated RPM and load conditions. Suitable for use with both OEM and aftermarket performance crankshafts featuring oversize fillet radius.

Note: Proper bearing clearance verification with plastigage or micrometers is required during installation. Follow engine builder guidelines for torque specifications and assembly procedures.