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, harmonic damper and flexplate - and the distinctive, racing-inspired valve covers that distinguish this crate engine as the latest in the ZZ legacy!

ZZ6 BASE TECH SPECS:

• Engine Type: Chevy Small-Block V-8
• Displacement: 350ci
• Bore x Stroke: 4.000'' x 3.480''
• Block: Cast-iron with four-bolt main caps
• Crankshaft: Forged steel, 1-piece rear main seal
• Connecting Rods: Forged powder metal
• Pistons: Hypereutectic aluminum
• Camshaft Type: Hydraulic roller (steel)
• Camshaft Lift: .474'' intake / .510'' exhaust
• Camshaft Duration (@.050 in.): 208° intake / 221° exhaust
• Cylinder Heads: 'Fast Burn' aluminum, 62cc combustion chambers
• Valve Size: 2.000'' intake / 1.550'' exhaust
• Compression Ratio: 9.72:1
• Rocker Arms: Aluminum roller style
• Rocker Arm Ratio: 1.5:1
• Distributor: HEI type
• Intake Manifold: Single plane aluminum
• Water Pump: Cast-iron, long-style
• Flexplate: 12.75'' diameter, 153-tooth
• Recommended Fuel: Premium pump
• Ignition Timing: 36° Total @ 4000 rpm
• Maximum Recommended RPM: 5800
• Balanced: External

GM Warranty

JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.