Chevrolet Performance 12729604 - LS3 L92 LS GEN4 Aluminum Bare Block

Nothing compares to GM Engineering, testing and durability when it comes to the foundation of your new engine. You can trust Chevrolet Performance for your LS block requirements. Engineered with deep side skirts, 6-bolt cross-bolted main caps, and the GM lightweight aluminum casting - this block gives you the assurance you need for building a new engine with a strong foundation and proven performance.

Block	LS3 L92 GEN4
Block Material	Production 319-T5 Aluminum - Iron Sleeves
Bore	4.065"
Max Recommended Bore	4.075"
Oiling	Factory LS
Rear Seal Type	1-Piece LS
Deck Height	9.240"
Apprx Weight	110-LBS