Hastings 3.4375" Bore +.040" Over Size, 8-Cylinder Ring Set with 5/64" Top Ring, 5/64" Second Ring, and a First Oil Ring is 5/32".
This Hastings 8-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
1977 Buick Century
1977-1979 Buick Electra
1977-1979 Buick Estate Wagon
1977-1978 Buick LeSabre
1977-1978 Buick Riviera
1977-1979 Oldsmobile 98
1977-1979 Oldsmobile Custom Cruiser
1977 Oldsmobile Cutlass
1977 Oldsmobile Cutlass Salon
1977 Oldsmobile Cutlass Supreme
1977-1979 Oldsmobile Delta 88
1977-1978 Oldsmobile Toronado
1977-1979 Pontiac Bonneville
1977-1979 Pontiac Catalina
1977-1979 Pontiac Firebird
1977 Pontiac Grand LeMans
1977 Pontiac Grand Prix
1977-1978 Pontiac Grand Safari
1977 Pontiac LeMans
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 4454.040
California Proposition 65 No
Engborein 4.351
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 5/64
Top Ring Surface Treatment PHOSPHATE
GTIN 00075538096825