Horsepower: 473 HP

Torque: 444 LB-FT

Forged Internals Support Higher Boost

If you want to stretch the performance of a turbocharged or supercharged combination, Chevrolet Performance’s LSX376-B15 is the foundation you need! Its durable, all-forged rotating assembly supports up to 15 pounds of boost– and our ratings of 473 horsepower and 444 lb.-ft. of torque are only baseline numbers of what this engine can offer.

The LSX376-B15 includes the six-bolt high-flow, rectangular-port LSX-LS3 heads. Additionally, we deliver the engine 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.

Our horsepower and torque ratings are based on testing with the productionstyle, normally aspirated fuel injection system. The power you make with a supercharger or turbo will vary.

INSTALLATION NOTES

• Assembly does not include any electronics
• Not intended for marine applications
• Requires LS/LSX Ignition Controller P/N 19355418 for carbureted applications
• LSX 8-bolt crank flange 
• Assembly shipped without an intake manifold
• Requires the purchase and installation of an oil pan (dust shield installed for shipment)
• Recommended max boost—15 psi
• Use LS376/525 engine control kit P/N 19354332 for fuel injected applications
• Calibration provided with control kit LS376/525 P/N 19354332 may need to be modified to match the remaining hardware selected for the application

TECH SPECS

• Part Number: 19417356
• Engine Type: LSX-Series Gen IV Small-Block V-8
• Displacement (cu in): 376 (6.2L)
• Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92 mm)
• Block (P/N 19417352): LSX cast iron with 6-bolt, cross-bolted main caps
• Crankshaft (P/N 12603616): Forged steel
• Connecting Rods (P/N 12604857): Forged powder metal
• Pistons (P/N 19259381): Forged aluminum
• Camshaft Type (P/N 12638426): Hydraulic roller
• Valve Lift (in): .560 intake / .555 exhaust
• Camshaft Duration (@.050 in): 210° intake / 230° exhaust
• Cylinder Heads (P/N 19419187): LSX-LS3 rectangular port; with “as cast” 68cc chambers and 6-bolt attachment
• Valve Size (in): 2.160 intake / 1.550 exhaust
• Compression Ratio: 9.0:1
• Rocker Arms (P/N 12669995 int): Investment-cast, roller trunnion
• Rocker Arms (P/N 12681275 exh): Investment-cast, roller trunnion
• Rocker Arm Ratio: 1.7:1
• Recommended Fuel: Regular pump
• Maximum Recommended rpm: 6,600
• Reluctor Wheel: 58x
• Balanced: Internal