Chevrolet Performance’s engineers started with the tough LS steel Bowtie standard-deck block, added a forged-steel crankshaft, forged rods, and forged pistons, then topped off the short-block assembly with high-flow, rectangular-port LSX-LS3 six-bolt aluminum heads for supercharged and turbocharged combinations.
We deliver the LSX376-B15 without an intake manifold and other accessories, allowing you to tailor the induction system and other features to suit the forced-induction setup of your choice. It’s perfect as an economical replacement for a late-model performer or a great choice to build a high-boost powerplant for a Pro Touring classic.
*Horsepower and torque ratings were derived by GM Engineering using a normally aspirated LSX376 with LS3 EFI. Your power numbers may vary, based on induction system and componentry.
Power: 450 HP @ 5900 RPM, 444 ft. lbs. of torque @ 4600 RPM
Displacement: 376 CID, 6.2L
Bore x Stroke: 4.060” x 3.620”
Compression Ratio: 9:1
Recommended Fuel: 87 Octane
Block: LSX Cast Iron with 6 bolt cross bolted main caps
Crankshaft: Forged 4340 steel, LSX 8 bolt flange
Connecting Rods: Forged Powdered Metal Steel
Pistons: Forged Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .560” Intake / .555” exhaust
Cam Duration @ .050”: 210 deg. Intake / 230 deg. Exhaust
Lobe Separation: 121
Cylinder Heads: Aluminum LS3 Rectangular style ports
Combustion Chamber: 68cc