Chevrolet Performance SP350/357 Turn-Key Crate Engine


  • 357 hp @ 5,500 rpm/407 lb.-ft. @ 4,000 rpm
  • Economical iron cylinder heads
  • Cast iron 4-bolt block
  • Complete, with distributor, carburetor and balancer installed

Have your engine dyno tested by one of our professional engine builders to ensure everything is properly broken in. We can dyno your engine with your components to make sure everything is working harmoniously before shipping you the whole assembly drained and ready to install.

Shipping is free, but there is a delivery fee for residential addresses.

SKU: 19433034 Categories: , Tag:

SP350/357 Turn Key Crate Engine

Here it is – the most legendary turn-key engine in hot rodding history. Whether you’re taking on a painstaking restoration of a beloved Chevy pick-up, or looking to light up the tires on your rat rod, and everything in between, the SP350/357 is the ideal engine choice. Chevy Performance’s newest iteration of the small block wonder keeps the time-tested architecture but adds modern improvements for increased reliability and usable power across the rpm range. 

With 357 hp and 407 lb.-ft. of peak torque at just 4,000 rpm, the Karl Kustoms Chevy SP350 turn-key motor features:

  • Hydraulic roller camshaft for optimized airflow
  • All brand new components – not remanufactured, including the block and four-bolt main caps, as well as a durable nodular iron crankshaft
  • The latest small-block dual plane intake manifold technology
  • High-quality engine accessories

What’s Included

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

Important Information

  • Chevrolet Performance Crate Engines include a 24-month or 50,000-mile (80,000 kilometers) limited warranty.
  • Not intended for marine applications

Installation Notes

  • Front-End Accessory Drive included but not installed
  • Comes with 12.750″ externally balanced 153-tooth automatic transmission flexplate. Requires externally balanced flywheel for manual transmission.
  • Requires fuel pump and line from fuel pump to carburetor.
  • You do have a tough transmission and rear axle, don’t you? Can we suggest a Karl Kustoms SuperMatic 6L80-E Automatic Transmission that can handle 650 lb.-ft. of output torque?
Weight 652 lbs


19367084, 19418190, 19420872, 19420883, 19431614

SP350/357 Turn Key Crate Engine Tech Specs

P/N 19433034

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

  • 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
  • Intake Manifold (P/N 12676887): Dual plane
  • Camshaft Type (P/N 12677151): Hydraulic roller
  • Valve Lift (in): 0.473″ intake / 0.473″ exhaust
  • Camshaft Duration (@0.050 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
  • Rocker Arms (P/N 12387346): Stamped steel
  • Rocker Arm Ratio: 1.5:1
  • Recommended Fuel: Premium pump
  • Ignition Timing: 32° Total @ 4,000 rpm
  • Maximum Recommended rpm: 5,600
  • Balanced: External
  • Flexplate (P/N 14088765): 12.750″



Chevrolet Performance Crate Engines include a 24-month or 50,000-mile (80,000 kilometer) limited warranty.

Click here for more detailed warranty information.


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Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

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