Manley Small Block Chevy 4-Inch Bore Dome Pistons

Features:

• Based on Standard 4.000'' bore block
• 23° Head Applications
• 2618 High Strength Alloy
• Lightweight Design
• Thick deck for high horsepower applications
• Lateral Gas Ports on Pistons with .043/.043/3mm Rings
• Round Wire Locks Included
• Pressure Balance Groove
• Perfect Ring Groove to Skirt Squareness
• .927'' Dia. x 2.300'' Long x .150'' Wall Premium Chrome Moly Wrist Pin

   

  Piston Common Specs:
• Compression Ratio: 14.9:1 w/ 58cc, 13.5:1 w/ 64cc, 11.5:1 w/ 76cc Combustion Chamber
• Dome Volume: 11.0cc Symmetrical Dome
• Crown Thickness: .200''
• Ring Thickness: Top Ring - 1.5mm or .043'' Gas Ported (.225'' down); Second Ring - 1.5mm (Napier profile) or .043'' (taper face); Oil Ring - 3mm
• Valve Notches: Two Intake Notches, .275'' deep
• Maximum Valve Sizes: 2.150'' Intake
• Valve Angle: 22°
• Pin Included: Premium Chrome Moly .927'' dia., 2.300'' long, .150'' wall
• Round Wire Locks: .061'' wide
• Recommended Piston Clearance: .005'' measured 1.100'' from bottom of the oil ring

   

  Technical Note: Compression ratios are calculated at .005'' deck clearance, a 4.060'' head gasket I.D. with a .040'' compressed thickness.