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![M40558-040 Piston Ring Set for 1961-1976 Ford, Mercury 5.9L, 6.4L, 6.7L [+0.040 in. Oversize]](https://www.jegs.com/images/mini_750/400/416/416-m40558-040.jpg)
Vehicle Info NeededENGINETECHPART 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
Ships on Sep 14, 2026
Lowest Price GuaranteeFord
Piston Ring Set1961-1976 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
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