A New Standard for Affordable Small-Block Performance!

If you’re looking for a budget-friendly powerhouse to bring your classic or custom build to life, the Chevrolet Performance SP350/357 Crate Engine is your answer. Delivering 357 horsepower and a strong reserve of low-end torque, this engine proves why the legendary Chevy 350 Small-Block remains the gold standard in performance and reliability.

Built with a brand-new 4-bolt main block, durable Vortec iron heads, and a hydraulic roller camshaft that enhances airflow and drivability, the SP350/357 provides a smooth, responsive performance with modern engineering. It delivers 24 more horsepower than the 350 HO—offering an unbeatable combination of power, longevity, and value for your project.

This base configuration is perfect for builders who prefer to complete their setup with their own accessories, carburetor, or intake system. For complete ready-to-run options, check out the SP350/357 Deluxe (P/N 12677170) or Turn-Key (P/N 12677177) packages.

TECH SPECS

• Part Number: 12677167 / 19367080

• Engine Type: Chevy Small-Block V-8

• Displacement: 350 cu in (5.7L)

• Bore x Stroke: 4.000″ x 3.480″

• Block (P/N 10105123): Cast iron with 4-bolt mains

• Crankshaft: Forged steel

• Connecting Rods (P/N 10108688): Powdered metal

• Pistons (P/N 88894280): Cast aluminum

• Camshaft Type (P/N 12677151): Hydraulic roller

• Camshaft Lift: 0.473″ intake / 0.473″ exhaust

• Camshaft Duration (@.050″): 215° intake / 223° exhaust

• Cylinder Heads (P/N 12558060): Cast iron; 64cc chambers

• Valve Size: 1.940″ intake / 1.500″ exhaust

• Compression Ratio: 9.0:1 nominal

• Rocker Arms (P/N 10089648): Stamped steel

• Rocker Arm Ratio: 1.5:1

• Recommended Fuel: Premium pump gas

• Ignition Timing: 32° total @ 4,000 rpm

• Maximum Recommended RPM: 5,600

• Balanced: External

• Flexplate: Not included

• Intake Manifold: Not included

INSTALLATION NOTES

• Use Holley 670-cfm 4-barrel carburetor (P/N 19170092) to achieve rated power and torque.

• Requires intake manifold, carburetor, distributor, spark plug wires, and water pump to complete assembly.

• Use externally balanced flexplate for automatic or externally balanced flywheel for manual transmissions.

• Requires neutral balanced damper.

• Designed for pre-1976 street vehicles or off-road builds.

• Not approved for marine applications.

• Distributor must include a melonized steel gear when paired with steel camshafts to prevent damage.

Key Benefits

• Proven Chevrolet durability with modern roller-cam efficiency

• Strong 4-bolt block for long-lasting reliability

• Ideal for street rods, muscle cars, and budget builds

• Backed by Chevrolet Performance’s 24-month / 50,000-mile warranty