The Chevrolet Performance LS Series Engine Blocks are driving a new generation of enthusiasts by providing a foundation for serious performance achievements. The LS7 blocks were directly designed from the legendary C5R race blocks using longer sleeves, factory torque plate honed cylinders and better castings.
Features:4.125" finished bore size
Production 319-T5 aluminum with pressed-in iron sleeves
Designed for 4.100" max stroke
6-Bolt Cross-bolted Main Caps
Strong and Lightweight Aluminum Alloy Casting
Provisions for the latest in Engine Control Management