ZZ6 New Member from Chevrolet Performance to the Iconic 350-Based “ZZ” Engine Family

Chevrolet Performance’s new ZZ6 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 ZZ6 to rev higher to make the most of every cubic inch of air drawn through it.

The ZZ6 also uses an aggressive hydraulic roller camshaft that supports the engine’s high-rpm airflow capability while maintaining excellent low-speed drivability. This Base crate engine kit includes the intake manifold, distributor, water pump, damper and flexplate – and the distinctive, racing-inspired valve covers that distinguish this crate engine as the latest in the ZZ legacy!


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

Ignition Timing: Base 10 degrees BTDC, 36 degrees total @ 4000 RPM

Engine Includes:

GM Licensed Black Aluminum Valve Covers

Aluminum Performance Intake

HEI Distributor and Spark Plugs

12-3/4” Auto Trans Flexplate

8” Harmonic Balancer

Cast Iron Long Water Pump

Oil Filter and Adapter

Passenger Side RH Oil Dipstick and Tube

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Small Block Chevy 350 405HP Base Crate Engine 19417576

Product Information

  • $6,423.48

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