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SP383 Deluxe

SP383 Deluxe

SKU: 19433035

More power from our classic Small-Block stroker


Chevrolet Performance’s big-torque SP383 Deluxe is more powerful than ever. We’ve added revised cylinder heads that incorporate a new, high-rpm valvetrain to help the SP383 Deluxe produce 435 horsepower and 445 lb-ft of torque. The new, lightweight aluminum cylinder head casting is based on the proven Fast Burn design, with large intake runners and 2.00-/1.55-inch valves. New beehive-style valve springs enable greater high-rpm performance and durability. They allow the SP383 Deluxe to rev higher, building more power to complement its low-rpm torque. The SP383 Deluxe is built with a brand-new block with four-bolt mains. It also features a forged-steel crankshaft, an aggressive hydraulic roller, camshaft, and durable, high-silicon pistons.


Unique valve covers distinguish the engine from previous versions and it now includes a high-flow, aluminum intake manifold. Use the Holley 770-cfm four-barrel carburetor (P/N 19170093) to make the most of the engine’s capability and achieve the listed horsepower and torque ratings. Your Chevrolet Performance dealer has everything you need to finish off the engine and get this small-block stroker running in your vehicle faster.

  • Horsepower

    435 HP

  • Torque

    445 LB-FT

  • Tech Specs

    Engine Type: Chevy Small-Block V8

    Displacement (cu. in.): 383

    Bore x Stroke (in.): 4.000 x 3.800

    Block (P/N 88962513): Cast-iron with 4-bolt main caps

    Crankshaft (P/N 12489436): Forged steel

    Connecting Rods (P/N 12497624): Heavy-duty PM steel

    Pistons (P/N 12499103): Hypereutectic aluminum

    Camshaft Type (P/N 19210723): Hydraulic roller

    Valve Lift (in.): .509 intake / .528 exhaust

    Camshaft Duration (@.050 in.): 222° intake / 230° exhaust

    Cylinder Heads (P/N 19300955): Fast Burn aluminum; 62-cc chambers

    Valve Size (in.): 2.000 intake / 1.550 exhaust

    Compression Ratio: 9.6:1

    Rocker Arms (P/N 10089648): Aluminum roller style

    Rocker Arm Ratio: 1.5:1

    Recommended Fuel: Premium

    Ignition Timing: 36° total at 4000 rpm

    Maximum Recommended rpm: 6000

    Balanced: External

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