ACL Bearings 5M7298HC-01 Race Series Coated Main Bearing Set 0.001" Undersize for GM LS Engines

The ACL Bearings 5M7298HC-01 is a Race Series coated main bearing set designed for Chevrolet LS engines, including 4.8L, 5.3L Gen III & IV, 5.7L LS1/LS6 Gen III, 6.0L LS2/Vortec Gen III & IV, and 6.2L LS3/Vortec Gen IV applications. This set features a .001 inch undersize specification for precision crankshaft matching.

Advanced CT-1 Coating Technology:

These bearings combine ACL's tough Race Series lining and overlay metallurgy with Calico's renowned CT-1 dry film lubricant coating, which helps reduce friction and abrasive wear. CT-1 coated bearings have demonstrated oil temperature reductions of 15°F to 20°F during operation. The coating provides intermittent dry lubrication, is not affected by dust or dirt, and is specifically engineered to withstand the extreme conditions of today's high-performance engines.

Race-Proven Performance Features:

• Manufactured to exacting tolerances with particular attention to wall thickness accuracy for reliable fit and consistent clearances
• Increased eccentricity to improve shape adaptation and compensate for bore distortion at high-speed operation
• Tri-Metal construction combining copper-lead alloy layer with steel backing and electroplated babbitt metal overlay for superior strength, durability, and critical surface characteristics
• CT-1 coating thickness of 0.00025" to 0.00030" (6 to 7.5 microns) for optimal protection
• Enhanced embedability, strength, and durability for professional engine builders

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, with proven performance in race engines from sport compact drift racing to NASCAR, IHRA, and NHRA competitions. The .001 inch undersize makes this set ideal for precision-machined crankshafts requiring tighter tolerances in high-performance and racing applications.