Hastings 3.147"/79.94 mm Bore +.010" Over Size, Single Cylinder Ring Set with 1.60 mm Top Ring, 2.00 mm Second Ring and a First Oil Ring is 4.00 mm.
This Hastings Single Cylinder Ring Set has a top ring manufactured from grey iron with phosphate ring surface treatment, a second ring manufactured from grey iron with phosphate ring surface treatment. The 1st oil control ring is manufactured of steel rail/stainless expansion with a chrome rail ring surface treatment.

Application Summary:

Year Make/Model
1982-1983 Mercury LN7
1981-1985 Mercury Lynx
Attributes
1st Oil Groove 4.00
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 2.00
2nd Ring Surface Treatment PHOSPHATE
California Proposition 65 No
Engborein 3.147
Engboremetric 79.94
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.60
Top Ring Surface Treatment PHOSPHATE
GTIN 00075538128007