Hastings Racing 3.910"/104.78 mm Standard Bore, 8-Cylinder Ring Set with 1.50 mm Top Ring, 1.50 mm Second Ring and a First Oil Ring is 3.00 mm.
This Hastings Racing 8-Cylinder Ring Set has a top ring manufactured from ductile iron with plasma moly 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
1972-1975 Chevrolet Bel Air
1972 Chevrolet Biscayne
1972 Chevrolet Brookwood
1976-1980 Chevrolet C20 Suburban
1972-1976 Chevrolet Caprice
1972-1973 Chevrolet Chevelle
1970-1976 Chevrolet El Camino
1976 Chevrolet G10
1975-1980 Chevrolet G20
1975-1980 Chevrolet G30
1972-1976 Chevrolet Impala
1975-1979 Chevrolet K10 Suburban
1975-1980 Chevrolet K20 Suburban
1975-1979 Chevrolet K5 Blazer
1972 Chevrolet Kingswood
1973-1976 Chevrolet Laguna
1973-1976 Chevrolet Malibu
1972-1976 Chevrolet Monte Carlo
1977 Chevrolet P10
1976 Chevrolet P30
1972 Chevrolet Townsman
1979-1980 GMC C1500
1978 GMC C25 Suburban
1979 GMC C2500
1980 GMC C2500 Suburban
1979 GMC C3500
1976 GMC G15
1979 GMC G1500
1975-1978 GMC G25
1979-1980 GMC G2500
1975-1978 GMC G35
1979-1980 GMC G3500
1975-1979 GMC Jimmy
1975-1978 GMC K15 Suburban
1979-1980 GMC K1500
1979-1980 GMC K1500 Suburban
1975-1978 GMC K25 Suburban
1979-1980 GMC K2500
1979-1980 GMC K2500 Suburban
1979-1980 GMC K3500
1971-1972 GMC Sprint
1974-1976 GMC Sprint
1972-1974 Pontiac Laurentian
1972-1974 Pontiac Parisienne
Attributes
1st Oil Groove 3.00
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
1st Oil Ring Surface Treatment CHROME RAIL
2nd Groove 1.50
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2M5581
California Proposition 65 No
Engborein 4.125
Engboremetric 104.78
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.50
Top Ring Surface Treatment PLASMA MOLY
GTIN 00075538229308