Hastings 3.866"/98.20 mm Standard Bore, Single Cylinder Ring Set with 2.50 mm Top Ring, 2.00 mm Second Ring and a First Oil Ring is 3.00 mm.
This Hastings Single 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 grey iron with a chrome ring surface treatment.

Application Summary:

Year Make/Model
2008-2010 Ford F-250 Super Duty
2008-2010 Ford F-350 Super Duty
2008-2010 Ford F-450 Super Duty
Attributes
1st Oil Groove 3.00
1st Oil Ring Material GREY IRON
1st Oil Ring Surface Treatment CHROME
2nd Groove 2.00
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2D5741S
California Proposition 65 No
Engborein 3.866
Engboremetric 98.20
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 2.50
Top Ring Surface Treatment CERAMIC CHROME
GTIN 00075538205340