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SP350/357 Turn-Key Chevrolet Crate Engine

Brand: Chevrolet Performance

Part Number: 12677177


The product's part number has been discontinued.


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P/N 12677177 has been superseded by P/N 19367084

SP350/357 Turn Key Chevrolet Performance Crate Engine

357 hp @ 5,500 rpm / 407 lb.-ft. @ 4,000 rpm


*****AVAILABLE SUMMER 2017*****


An affordable Small-Block performer ready to run - SP350/357 Turn-Key!

The Chevrolet Performance line of GM Street Performance engines offers great power at a great value – and the latest is the SP350/357. It leverages the strength of a strong rotating assembly secured in a brand-new block with four-bolt mains, and matches it with modern valvetrain technology to support great high-rpm capability. 

Economical iron cylinder heads deliver excellent airflow, while the latest intake manifold technology and a new hydraulic roller camshaft optimize airflow to push 357 horsepower and more than 400 lb.-ft. of torque! Better still, the engine is built with a durable rotating assembly set in a brand-new block with four-bolt mains. That’s a feature you won’t find on most rebuildable cores.

Our SP350/357 Turn Key crate motor package comes complete with the distributor, carburetor and balancer installed. The starter, fuel pump air conditioning pump, alternator, front-end accessory drive kit and more are also included, ready to bolt on.

Chevrolet Performance also offers the SP350/357 Base crate engine, P/N 12677167 as well as the SP350/357 Deluxe P/N 12677170.


SP350/357 Turn-Key Specs:

Part Number: 12677177
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 10243070): Nodular Iron
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
Balanced: External
Flexplate (P/N 14088765): 12.750"
Intake Manifold (P/N 12676887): Dual Plane

This Chevrolet Performance Crate Engine includes a 24-Month or 50,000-Mile/80,000-Kilometer Limited Warranty

Installation Notes

  • 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.

Click here for more detailed warranty information.