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350/385 Base

350/385 Base

SKU: 19433039

A legendary foundation for performance


Building on the strength and power of its predecessors, Chevrolet Performance engineers have upped the ante with a revised cylinder head design, new valvetrain components, and more to create the SP350/385 Base—a 385-horsepower 350 with loads of low-end torque. In fact, the SP350/385 Base Small-Block engine produces at least 405 lb-ft of torque by only 3600 rpm for a thrilling feeling of immediate performance. 

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, as the egg-shaped springs have less reciprocating mass in motion, require less spring pressure for greater valve control, and handle valvetrain stresses more efficiently. 

As with all of Chevrolet Performance’s Small-Block crate engines, the SP350/385 Base 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 this new crate engine at a glance, too. 

The base crate engine package includes an aluminum intake manifold, distributor, water pump, damper, flexplate, and more.

  • 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 3.480

    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 (@0.050 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

    Maximum Recommended rpm: 5800

    Balanced: External

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