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Chevrolet Performance 19299306 - Chevrolet Performance LSX376-B15 376ci/450HP Engine

Chevrolet Performance 19299306 - Chevrolet Performance LSX376-B15 376ci/450HP Engine

JEGS Part Number: 809-19299306

LSX376-B15 Crate Engine
  • 450 HP, 444 TQ

    Chevrolet Performance 19299306 - Chevrolet Performance LSX376-B15 376ci/450HP Engine Details


  • 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

  • Free Shipping!

    If building an engine for supercharged or turbo power, start with this boost-ready LSX376-B15 crate engine featuring strong internal components that withstand the pressure of forced induction. For builders looking to stretch the performance of a supercharged or turbocharged application, the LSX376-B15 makes an ideal foundation. Its all-forged rotating assembly can handle up to 15 pounds of boost. This engine is also an economical replacement for late model performers or a high-boost power plant for Pro Touring classics.

    Chevrolet Performance engineers began with the Bow Tie LS standard deck short block and added forged pistons, rods, and crankshaft. The block assembly was then topped off with 6-bolt LSX/LS3 rectangular port aluminum heads to accommodate a supercharger or turbo. To allow induction customization plus adequate support of the forced induction, the LSX376-B15 does not include an intake manifold or other accessories.

  • 450 HP at 5900 RPM
  • 444 ft/lbs TQ at 4600 RPM
  • Compression Ratio: 9 to 1
  • 4.065" Bore x 3.622" Stroke
  • Forged 4340 Steel Crankshaft
  • Valves: 2.160" Intake/1.590" Exhaust
  • LSX Iron Block with Cross-Bolted 6-Bolt Main Caps
  • Camshaft: 210°/230° Duration, .560"/.555" Lift (Hydraulic Roller)
  • Forged Aluminum Pistons and Forged Powdered Metal Connecting Rods
  • High-Flow LSX/LS3 Rectangular Port Aluminum Heads with As-Cast 68cc Combustion Chambers and 6-Bolt Attachment
  • Recommended Fuel: 87 Octane

    Note: Horsepower and torque ratings were derived by GM Engineering using a normally aspirated LSX376 with LS3 EFI. Your results may vary based on induction system and other components.

    JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

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