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M40558-040 Piston Ring Set for 1961-1976 Ford, Mercury 5.9L, 6.4L, 6.7L [+0.040 in. Oversize]
InfoVehicle Info Needed
ENGINETECHPART NUMBER: 416-M40558-040

M40558-040 Piston Ring Set for 1961-1976 Ford, Mercury 5.9L, 6.4L, 6.7L [+0.040 in. Oversize]

$10899
ShippingShips on 11/18/2026
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Ford
Piston Ring Set
  • 1961-1976 Ford, Mercury 5.9L, 6.4L, 6.7L
  • Standard Ring Set
  • Size: +0.040 in. Oversize
  • Sold as a Set

    The Enginetech M40558-040 is a piston ring set for 1961-1976 Ford, Mercury 5.9L, 6.4L, 6.7L. 5/64 3/32 3/16. Check piston grooves before using engines at +0.040 in. Oversize oversize. Ring set is engineered for proper cylinder sealing and oil control.

    Enginetech M40558-040 Piston Ring Set Features:

    • Fitment: Ford, 360 ci, 390 ci, 410 ci
    • Size: +0.040 in. Oversize
    • Engineered to OE specifications for direct replacement
    • Note: Premium. 5/64 3/32 3/16./64 3/32 3/16. Check piston grooves before using./64 3/32 3/16. Does not fit OE pistons. Check piston grooves before using.
    • Part TypePiston Ring Set
    BrandENGINETECH
    Package Height2.0
    Package Width5.0
    Package Length10.0
    Weight1.25 PG
    Part CategoryReplacement Parts
    GaplessNo
    Second Compression Ring Thickness3/32
    Size+0.040 in. Oversize
    Top Compression Ring Thickness5/64
    File FitNo
    Top Ring MaterialStandard
    QuantitySold as a set
    Oil Ring Thickness3/16
    FitmentFord
    Part FitmentDirect Fit
    Ring Outside Diameter4.050
    Vendor Part NumberM40558-040
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning