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ICON Premium Forged Big Block Chrysler 440 RB 493 ci. Pistons Step Dish Top 4.350 in. Bore
InfoVehicle Info Needed
UNITED ENGINE MACHINEPART NUMBER: 648-IC840.030

ICON Premium Forged Big Block Chrysler 440 RB 493 ci. Pistons Step Dish Top 4.350 in. Bore

$77319
ShippingShips on 11/05/2026
Lowest PriceLowest Price Guarantee

Chrysler RB 493 ci. (440 Block)
  • Step Dish Top Pistons
  • Use w/6.768 in. Connecting Rods & 4.150 in. Crank Stroke
    • ICON Premium Forged Big Block Chrysler 440 RB 493 ci. Pistons
  • Bore: 4.350 in. (+.030 in.)
  • Head Type: Step Dish (+23.7 cc) w/2 Valve Reliefs
  • Comp. Height: 1.869 in.
  • Rod: 6.768 in.
  • Stroke: 4.150 in.
  • Rings: 1/16, 1/16, 3/16 in.
  • Set of 8

    ICON Premium Forged Big Block Chrysler 440 RB 493 ci. Pistons Specifications:

    • Engine Family: Mopar 440 Big Block RB
    • Engine Size: 493 ci.
    • Exhaust Valve Depth/Diameter: .199/1.880 in.
    • Intake Valve Depth/Diameter: .215/2.300 in.
    • Piston Material: Forged 2618 Alloy

    • United Engine and Machine Company is proud to introduce their new Icon line of forged pistons. Icon brings the same quality and performance you've come to expect from other United Engine brands while adding a new lightweight forged design. No matter your high performance application, there is an Icon piston for you.

    Features:

    • High ductility 2618 alloy
    • Perfect for Nitrous, Turbocharged and Supercharged Apps
    • Dual forced pin oiling on most applications
    Show More
    • Lateral gas porting on higher compression ratios
    • Fully machined with deep valve pockets
    • Second land accumulator grooves
    • Top land mini groove technology
    • Diamond finished skirts
    • Triple wound spiral locks
    • Spacer rings included in short compression heights that intersect the wrist pin bore
    Part TypePiston
    Product LineUEM Pistons Icon Premium Forged Series Big Block Chrysler Pistons
    BrandUNITED ENGINE MACHINE
    Package Height5.1
    Package Width10.6
    Package Length21.0
    Weight16.6 PG
    Part CategoryPerformance Parts
    Piston Ring Thickness (In.)1/16 x 1/16 x 3/16
    Wrist Pin StyleFull Floating
    QuantitySet of 8
    Piston MaterialForged
    Pin Diameter0.99 in (25.1 mm)
    Part FitmentSemi Universal
    Piston StyleDish, with two valve reliefs
    Bore4.32 in (109.728 mm)
    Vendor Part NumberIC840.030
    Package Qty1
    Package TypeEA
    Please click here to download the instructions PDF file

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    Some parts are not legal for use in California or other states with similar laws / regulations
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