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Engine Includes:

Black finned aluminum valve covers with matching breather & PCV
FiTech Fuel Injection Black 600HP self-learning injection system
Chevrolet Performance HEI distributor
Spark plugs, plug wires and looms
8” harmonic balancer
Oil filter and adapter
Passenger side RH oil dipstick and tube
Limited 2 year / 50,000 mile parts & labor warranty for street registered/licensed vehicles.

Specifications:

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: Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: Forged Steel
Connecting Rods: 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: Dual Bolt Pattern Fast Burn Aluminum, 3/8” screw-in rocker studs
Combustion Chamber: 62cc
Valves: .200” Intake/ 1.55” Exhaust
Rocker Arms: Aluminum Roller, 1.5:1 Ratio
Valve Springs: LS Beehive 12625033
Balance: External
Maximum GM Recommended RPM: 5800
GM Recommended Torque Converter 3000-3400 Stall

Ohio Speed Shops new Street Boss 604 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 Street Boss 604 to rev higher to make the most of every cubic inch of air drawn through it.

The Street Boss 604 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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Ohio Speed Shops 19318604 Street Boss 604 Throttle Body Injected Engine

  • $7,150.00