Product Summary

  • Choose Bore (inch): 4.125 or 4.155
  • Top Ring 1.0MM
  • 2nd Ring 1.0MM
  • Oil Ring 2.0MM
  • File Fit Rings

Key Specs

MFG. Part #

Need To Know

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Quick and Easy Returns

Return Policy


Mahle new 1MM-1MM-2MM ring packs includes a steel top ring with their patented HV385 supersonic thermal spray process applied to the top ring for increased durability and increased scuff resistance. A steel Napier second ring and industry leading CP-20 oil ring make for a far superior product above the rest!

Choose Bore (inch): 4.125 or 4.155

  • Top Ring 1.0MM
  • 2nd Ring 1.0MM
  • Oil Ring 2.0MM
  • File Fit Rings

How to select ring size:

  • -005 = 4.125" bore + .005"
  • -035 = 4.155" bore + .005"

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.


MFG. Part #
Piston Ring Diameter
Piston Ring DesignConventional
Top Ring MaterialMoly-Faced Ductile Iron
Top Ring Thickness1.0 mm
Second Ring MaterialCast Iron
Second Ring Thickness1.0 mm
Oil Ring Thickness2.0 mm
Oil Ring TensionStandard Tension
Sold in QuantitySet