Supports more boost

For builders who want to stretch the performance of a turbocharged or supercharged combination, the LSX376-B15 is the foundation they need.

PART NO. 19355575


473 HP @6000 RPM


444 LB/FT @5000 RPM

Withstands the pressure

The LSX376-B15 is durable, and its all-forged rotating assembly supports up to 15 pounds of boost. 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.

Installation Guides

Find everything from vital data about your engine’s capabilities to how to install it into your build.

LSX376-B15 Tech Specs

  • Part Number: 19355575
  • 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 19260095): LSX cast-iron with six-bolt, cross-bolted 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” 68-cc chambers/six-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 12681275 exh): Investment-cast, roll trunnion
  • Rocker Arm Ratio: 1.7:1
  • Recommended Fuel: Regular pump
  • Maximum Recommended rpm: 6600
  • Reluctor Wheel: 58X
  • Balanced: Internal

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.