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350/385 Turn-Key

350/385 Turn-Key

SKU: 19433040

A legendary foundation with Turn-Key ease


Chevrolet Performance’s SP350/385 Turn-Key uses new-casting Fast Burn cylinder heads equipped with LS-style beehive valve springs for greater high-rpm performance.


The 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 SP350/385  to rev higher to make the most of every cubic inch of air drawn through it. The SP350/385  is built with a brand-new block with four-bolt mains, along with a forged-steel crankshaft, an aggressive hydraulic roller camshaft, and durable, high-silicon pistons. Unique valve covers distinguish this new crate engine at a glance, too—along with Chevy bowtie insignias in the ends of the cylinder heads that let everyone know you have the latest Chevrolet Performance hardware under the hood.


The Turn-Key engine package includes the distributor, carburetor, and balancer installed. The starter, fuel pump, air conditioning pump, alternator, front-end accessory drive kit, and more are also included.

  • Horsepower

    385 HP

  • Torque

    405 LB-FT

  • Tech Specs

    Engine Type: Chevy Small-Block V-8

    Displacement (cu. in.): 350

    Bore x Stroke (in.): 4.000 x 3.800

    Block (P/N 10105123): Cast-iron with 4-bolt main caps

    Crankshaft (P/N 12556307): Forged steel

    Connecting Rods (P/N 10108688): Powdered metal

    Pistons (P/N 10159436): Hypereutectic aluminum

    Camshaft Type (P/N 10185071): Hydraulic roller

    Camshaft Lift (in.): .474 intake / .510 exhaust

    Camshaft Duration (@.050 in.): 208° intake / 221° 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 nominal

    Rocker Arms (P/N 10089648): Stamped steel

    Rocker Arm Ratio: 1.5:1

    Recommended Fuel: Premium

    Ignition Timing: 36° total at 4000 rpm

    Maximum Recommended rpm: 5800

    Balanced: External

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