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.
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