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 Stock GM LS Oiling System Stock Forged Powdered Metal Caps Provisions for Active Fuel Management (AFM) Build Your Own Stroker LS 416 or 427