Chevrolet Performance LSX 376 Bowtie Engine Block Semi Finished # 19417351Engine Block, LSX Bowtie, Bare, Cast Iron, 6 bolt Main Bolt Style, 9. 260 in. Standard Deck, Semi Finished, Chevrolet, Each Main Journal Type: Chevy LS Engine Block Material: Cast iron Engine Block Style: Aftermarket Engine Block Deck Height: Standard deck Deck Height (in.): 9. 260 in. Cylinder Bore as Shipped: 3. 880 in. Maximum Bore Diameter (in.): 4. 250 Engine Block Weight (lbs.): 225 lbs. Main Bolt Style: 6 bolt Main Caps Included: Yes Main Cap