Product Summary

350, Forged Aluminum Piston Material, 3.48" Stroke

    Key Specs

    Piston StyleFlat Top w/ 2 valve reliefs
    Piston MaterialForged Aluminum

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    The Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins and locks. They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.

    1.5mm, 1.5mm, 3.0mm file fit performance ring set is included. For 350 c.i. S/B Chevy (4.000" bore x 3.48" stroke).

    • Comp Height 6.0" Rod:  1.250
    • Pin Diameter:  0.927
    • Clearance Guide
      • *Meas. = 0.500
      • Min = 0.0025
      • Max = 0.0033

    *The location to measure piston-to-wall clearance for each application. This point is calculated from the bottom of the piston skirt and indicates the widest part of the piston and thus where to measure. For all Mahle 350 pistons except 4V Flat 503-55004 for which Meas. = 0.465

    PowerPak Piston Chart Application (GIF)

    Item Details

    C/R 58cc=11.3, 64cc=10.6, 70cc=9.8
    Piston Weight: 429 g
    Rod Length: 6"

    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    Piston StyleFlat Top w/ 2 valve reliefs
    Piston MaterialForged Aluminum
    Piston Diameter4.030"
    Connecting Rod Length6.000"
    Piston Weight429 grams
    Piston Ring StyleE
    Wrist Pin Diameter0.9270"
    Second Ring MaterialCast Iron
    Top Ring Thickness1.5 mm
    Top Ring MaterialDuctile Iron
    Second Ring Thickness1.5 mm
    Oil Ring Thickness3.0 mm
    Oil Ring TensionStandard Tension
    Sold in QuantitySet