SP350/357 Turn-Key 357 HP
An Affordable Small-Block Performer!
With 357 horsepower and more than 400 lb.-ft. of torque, the Chevrolet Performance 350/357 Turn-Key offers a great combination of performance and value.
Modern valvetrain technology is the key to its high-revving capability, pushing power to 5,500 rpm, while economical iron cylinder heads deliver excellent airflow and help make this potent crate engine more affordable. They’re matched with a friction-reducing roller camshaft that helps optimize performance across the rpm band.
The rest of 350/357 Turn-Key is built with strong, all-new components, including a brand-new four-bolt block, a durable nodular iron crankshaft and more. As one of our Turn-Key crate engines, it also includes an aluminum intake manifold, Holley four-barrel carburetor and HEI distributor and balancer installed, while a starter, water pump and front-end accessory drive kit—including an air conditioning compressor, alternator and more—are also included (installation required).
Part Number: 12677177 / 19367084
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 ): Forged steel
Connecting Rods (P/N 10108688): Powdered metal
Pistons (P/N 88894280): Cast aluminum
Camshaft Type (P/N 12677151): Hydraulic roller
Camshaft Lift (in): 0.473" intake / 0.473" exhaust
Camshaft Duration (@.050 in): 215° intake / 223° exhaust
Cylinder Heads: Cast iron; as cast with 64cc chambers
Valve Size (in): 1.940 intake / 1.500 exhaust
Compression Ratio: 9.0:1 nominal
Rocker Arms (P/N 12367346): Stamped steel
Rocker Arm Ratio: 1.5:1
Recommended Fuel: Premium pump
Ignition Timing: 32º Total @ 4,000 rpm
Maximum Recommended rpm: 5,600
Flexplate (P/N 14088765): 12.750"
Intake Manifold (P/N 12676887): Dual Plane
• Front-End Accessory Drive included but not installed for shipment
• Comes with 12.750" externally balanced 153-tooth automatic transmission flexplate. Requires externally balanced flywheel for manual transmission.
• Requires fuel supply line from fuel pump to carburetor
• Designed for pre-1976 street vehicles or any off-road vehicle
• Not intended for marine applications
NOTE: Distributor with melonized steel gear MUST be used with long-blocks and Partial engines with steel camshafts, or engine damage will occur.
Chevrolet Performance Crate Engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty.