Chevrolet Performance 12639087 Features:

• Engine Type: Gen V Small Block V-8 direct injection spark ignition
• Displacement (cu. in.): 400 (6.6L)
• Bore x Stroke (in / mm): 4.060 x 3.860 (103.25 mm x 98 mm)
• Block: Cast iron with 6-bolt nodular main bearing caps
• Crankshaft: Forged steel
• Connecting Rods: Forged powder-metal
• Pistons: Hypereutectic aluminum
• Camshaft Type: Billet steel hydraulic roller
• Valve lift (in): 0.500 intake / 0.492 exhaust
• Camshaft Duration (@0.050 in): 193° intake / 199° exhaust
• Cylinder Heads: Aluminum rectangular port D/I with 59.02cc chambers
• Valve Size (in): 2.130 hollow intake / 1.590 inconel exhaust
• Compression Ratio: 10.8:1 (nominal)
• Rocker Arms: Investment cast roller trunnion
• Rocker Arm Ratio: 1.8:1
• Intake manifold: Composite
• Throttle body: 87mm diameter (single-bore)
• Fuel delivery: High-pressure direct injection (2,175 psi / 150 bar)
• Recommended fuel: 87 octane
• Ignition system: Coil-on-plug
• Maximum Recommended RPM: 5600 rpm
• Reluctor wheel: 58X
• Balanced: Internal