LSX376 Long Block

LSX376 Long Block

FORGED INTERNALS SUPPORT MORE BOOST!
For builders who want to stretch the performance of a turbocharged or supercharged combination, Chevrolet Performance’s LSX376-B15 is the foundation they need! Its durable, all-forged rotating assembly supports up to 15 pounds of boost. Our ratings of 473 hp and 444 lb.-ft. are only an indication fo what the engine is capable of.

Additionally, the engine is topped off with high-flow, LSX-LS3 6-bolt rectangular-port heads to create an affordable foundation 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.

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

TECH SPECS
Part Number: 19332320 / 19355575 / 19417356 (Newest)
Engine Type: LSX-Series Gen IV Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92 mm)
Block (P/N 19260095): LSX cast-iron with 6-bolt, crossbolted main caps
Crankshaft (P/N 12603616): Forged steel
Connecting Rods (P/N 12604857): Forged powdered metal
Pistons (P/N 19259381): Forged aluminum
Camshaft Type (P/N 12638426): Hydraulic roller
Valve Lift (in): 0.560 intake / 0.555 exhaust
Camshaft Duration (@0.050 in): 210° intake / 230° exhaust
Cylinder Heads (P/N 19201805): 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, roll trunnion
Rocker Arms (P/N 12669993 exh): Investment-cast, roll trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Regular pump
Maximum Recommended rpm: 6,600
Reluctor Wheel: 58x
Balanced: Internal

INSTALLATION NOTES
• Assembly does not include any electronics
• Intended for pre-1976 street vehicles or any off-road vehicle
• Not intended for marine applications
• Requires LSX Ignition Controller P/N 19171130 for carbureted applications
• LSX 8-bolt crank flange
• Assembly shipped without intake manifold or oil pan (dust shield installed for shipment)
• Recommended max boost - 15 psi

Off road use only.