Hastings 3.897"/99.00 mm Bore +.040"/1.00 mm, 8-Cylinder Ring Set with 3.00 mm Top Ring, 2.00 mm Second Ring and a First Oil Ring is 2.50 mm.
This Hastings 8-Cylinder Ring Set has a top ring manufactured from ductile iron with ceramic chrome surface treatment, a second ring manufactured from carbidic iron with phosphate ring surface treatment. The 1st oil control ring is manufactured of stainless steel with a nitrided ring surface treatment.

Application Summary:

Year Make/Model
2011-2020 Ford F-250 Super Duty
2011-2020 Ford F-350 Super Duty
2011-2019 Ford F-450 Super Duty
2011-2019 Ford F-550 Super Duty
Attributes
1st Oil Groove 2.50
1st Oil Ring Material STAINLESS STEEL
2nd Groove 2.00
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2D5853.100
California Proposition 65 No
Engborein 3.897
Engboremetric 99.00
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 3.00
Top Ring Surface Treatment CERAMIC CHROME
GTIN 00075538385660