ACL LS Main Bearing Set - .001 Extra Clearance

The ACL LS Main Bearing Set - .001 Extra Clearance is designed for Gen III and Gen IV GM LS engine builds requiring additional bearing clearance for high-performance applications. Manufactured by ACL Bearings, these race-proven main bearings provide exceptional durability, load capacity, and oil control for street, racing, boosted, and stroker engine combinations.

Featuring an additional .001" of clearance over standard-size bearings, this set is ideal for engine builders targeting optimized oil clearance in performance applications where increased RPM, higher cylinder pressures, or specific crankshaft specifications demand additional bearing clearance.

Features

Designed for Gen III and Gen IV GM LS engines
.001" Extra Clearance for performance engine builds
High-strength tri-metal bearing construction
Excellent fatigue resistance and load carrying capacity
Ideal for naturally aspirated, nitrous, supercharged, and turbocharged applications
Precision manufactured for consistent bearing clearances
Trusted by professional engine builders and racers worldwide

Specifications

Brand: ACL Bearings
Part Type: Main Bearing Set
Engine Family: Gen III / Gen IV LS
Size: .001" Extra Clearance (Undersized Bearing Thickness)
Coated: No

Fitment

GM Gen III LS Engines
GM Gen IV LS Engines
LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, LY6, L92, LSA, LSX and related variants

Recommended Applications

Performance street engines
High-RPM naturally aspirated combinations
Turbocharged and supercharged LS builds
Nitrous-assisted applications
Stroker engine combinations requiring additional bearing clearance

Note: Bearing clearance should always be measured and verified during engine assembly. The .001" extra clearance design is intended for applications where additional oil clearance is desired beyond standard bearing specifications.