Enginetech BB253J040 Connecting Rod Bearing Set .040" Undersize

The Enginetech BB253J040 is a complete connecting rod bearing set designed for GM Chevrolet small block V8 and LS series engines. This set features .040" undersize bearings, making them ideal for crankshafts that have been machined .040" undersize during rebuild or repair work.

Advanced Aluminum-Silicon Construction:

• Premium aluminum-silicon alloy material provides superior performance and durability
• High load capacity with excellent anti-friction properties for enhanced wear resistance
• Precision-engineered parting line chamfers ensure proper oil flow without reducing oil pressure
• Manufactured on state-of-the-art equipment for consistent bearing thickness and proper oil clearances
• Features anti-seizure properties and excellent embeddability for debris protection

Key Features:

• .040" undersize specification for machined crankshafts
• Compatible with GM Small Block and LS series engines including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L
• Engineered to meet or exceed OEM specifications
• Trusted by professional engine rebuilders for over 25 years

Enginetech has evolved their bearing technology to utilize advanced aluminum-silicon alloys that equal or surpass the performance of traditional tri-metal designs while being more environmentally friendly and cost-effective. Each bearing is precision-manufactured to ensure reliable performance and longevity in demanding applications.