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Engine Includes:

OE black stamped steel valve covers
PCV valve, breather & oil fill cap
Mechanical secondaries 750CFM black & silver carb with electric choke
Carb fuel inlet and plumbing to fuel pump
110 GPH performance fuel pump with adjustable inlet & outlet
Chevrolet Performance HEI distributor
Spark plugs, plug wires and looms
Chevrolet Performance 8” harmonic balancer
Initial engine break-in on dyno prior to test and tuning
Dyno Tested and Tuned
Limited 2 year / 50,000 mile parts & labor warranty for street registered/licensed vehicles.


Power: 405 HP @ 5600 RPM, 406 ft. lbs. of torque @ 4600 RPM
Displacement: 350 CID, 5.7L
Bore x Stroke: 4.00” x 3.48”
Compression Ratio: 9.72:1
Recommended Fuel: 92 Octane
Block: New GM Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: New GM Forged Steel
Connecting Rods: GM Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .474” Intake / .510” exhaust
Cam Duration @ .050”: 208 deg. Intake / 221 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: GM Fast Burn Aluminum, 3/8” screw-in rocker studs
Combustion Chamber: 62cc
Valves: .200” Intake/ 1.55” Exhaust
Rocker Arms: Chevrolet Performance Aluminum Roller, 1.5:1 Ratio
Valve Springs: LS Beehive 12625033
Balance: External
Sustained Maximum Recommended RPM: 5800
Recommended Torque Converter 3000-3400 Stall

Ohio Speed Shops new SBC 350 405HP Crate Engine delivers more power than any 350 Small-Block ever installed in a production vehicle. Rated at 405 hp and 406 lb.-ft. of torque, it derives its range-topping performance from unique, lightweight aluminum cylinder heads that enable optimal airflow at high rpm.

The cylinder head casting is based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. Beehive-style valve springs deliver greater high-rpm performance and durability. Their egg-shaped profiles have less reciprocating mass in motion, require less spring pressure for greater valve control and handle valvetrain stresses more efficiently. They allow the small block Chevy 350 to rev higher to make the most of every cubic inch of air drawn through it.

The Ohio Speed Shops Dyno Tested SBC 350 405HP Crate Engine also uses an aggressive hydraulic roller camshaft that supports the engine’s high-rpm airflow capability while maintaining excellent low-speed drivability.

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SBC 350 405HP Crate Engine Dyno Tested OE Finish 19351532-2C

  • $7,100.00