Standard and Optional Specifications Warranty Fuel Economy Dimensions Capacities Trailering Braking Engine Steering Transmission   Engine   Coupe Convertible Z06  RPO LS2 LS2 LS7 Displacement (liters/cu.in) 6.0/364 6.0/364 7.0/427  Bore & Stroke (in.) 4.00 X 3.62 4.00 X 3.62 4.125 X 4.0 Bore & Stroke (mm) 101.6 X 92 101.6 X 92 104.8 X 101.6 Compression ratio 10.9:1 10.9:1 11.0:1 Block material aluminum aluminum aluminum Cylinder head material aluminum aluminum aluminum Valves per cylinder 2 2 2 Valvetrain pushrod with overhead valves pushrod with overhead valves pushrod with overhead valves Induction system sequential EFI sequential EFI sequential EFI Lifters hydraulic hydraulic hydraulic Cam drive chain chain chain Recommended unleaded fuel 93 octane 93 octane 93 octane (required) Redline (rpm) 6,500 6,500 7,000 Horsepower/kW@ engine rpm 400/299 @ 6,000 rpm 400/299 @ 6,000 rpm 505/377 @ 6,300 rpm Torque (lb.-ft./N-m) @ engine rpm 400 lb.ft./ 542 @ 4,400 rpm 400 lb.ft./ 542 @ 4,400 rpm 470 lb.ft./ 637 @ 4,800 rpm Oil distribution system Crankcase Crankcase Dry sump