PRODUCT DESCRIPTION
Fits: Mopar Big Block RB
Eng. Disp. In. 493
Eng. Disp Liters 8.1
Year Range -
Bore (in) 4.32
Bore (mm) 109.7
Stroke (in) 4.15
Stroke (mm) 105.4
Oversized Yes
Ring Pack 1/16, 1/16, 3/16
Top Land .260
Pin Number .990x3.000
Pin Type Press or Floating
Pin Diameter (in) .990
Pin Diameter (mm) 25.1
Lock PRG110-3
Compression Height IN 1.867
Compression Height MM 47.4
Crown (cc) +4.5cc
Alloy 2618
Compression Ratio 75-12.3, 78-12.0, 88-10.9
ICON premium forged pistons are made from high-strength, heat-treated T-6 2618 primary aluminum alloy. They feature a diamond-machined skirt, head, mini-grooves, pin bore, gas accumulator, ring grooves, and pressure-drilled pin hole oiling. The pistons have a V-rib design for light weight, strength, and maximum piston cooling. Compare weight, performance, design, and cost—and you will win with ICON!
