Hastings 4.25" Bore +.020" Over Size, 8-Cylinder Ring Set with 5/64" Top Ring, 5/64" Second Ring and a First Oil Ring is 3/16.
This Hastings 8-Cylinder Ring Set has a top ring manufactured from steel 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
1991-1993 Chevrolet C1500
1991-2000 Chevrolet C2500
1992-1999 Chevrolet C2500 Suburban
1991-2000 Chevrolet C3500
1996-2000 Chevrolet Express 3500
1991-1996 Chevrolet G30
1991-2000 Chevrolet K2500
1992-1999 Chevrolet K2500 Suburban
1991-2000 Chevrolet K3500
1991-1999 Chevrolet P30
1991 Chevrolet R2500 Suburban
1991 Chevrolet R3500
1991 Chevrolet V3500
1991-2000 GMC C2500
1992-1999 GMC C2500 Suburban
1991-2000 GMC C3500
1991-1996 GMC G3500
1991-2000 GMC K2500
1992-1999 GMC K2500 Suburban
1991-2000 GMC K3500
1991-1999 GMC P3500
1991 GMC R2500 Suburban
1991 GMC R3500
1996-2000 GMC Savana 3500
1991 GMC V3500
Attributes
1st Oil Groove 3/16
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 5/64
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2M4718.020
California Proposition 65 No
Engborein 4.25
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
Notes W/Shallow Oil Grv.
SDR Required Flag N
Top Groove 5/64
Top Ring Surface Treatment PLASMA MOLY
GTIN 00075538168737