Chevrolet Performance LS 6.0L Bare Engine Block LQ4 / LQ9 # 12733807Chevrolet Performance LS 6. 0L Bare Engine Block LQ4 LQ9 Non AFM # 12733807 Part Type Engines, Bare Blocks Product Line GM Performance LS Bare Engine Blocks Main Journal Type Chevy LS Engine Block Material Cast iron Engine Block Style OEM Engine Block Deck Height Standard deck Deck Height (in.) 9. 240 in. Cylinder Bore as Shipped 4. 002 in. Maximum Bore Diameter (in.) 4. 030 Camshaft Location Standard Engine Block Weight (lbs.) 215 lbs. Main Bolt