Hastings 3.307"/84.00 mm Standard Bore, 1-Cylinder Ring Set with 3.00 mm Top Ring, 2.00 mm Second Ring and a First Oil Ring is 2.00 mm.
This Hastings 1-Cylinder Ring Set has a top ring manufactured from ductile iron with ceramic chrome surface treatment, a second ring manufactured from ductile iron with phosphate ring surface treatment. The 1st oil control ring is manufactured of ht iron with a chrome ring surface treatment.

Application Summary:

Year Make/Model
2003-2006 BMW 330Ci
2003-2007 BMW 330i
2003-2005 BMW 330xi
2009-2011 BMW 335d
2014-2016 BMW 535d
2014-2016 BMW 535d xDrive
2018 BMW 540d xDrive
2009-2010 BMW X5
Attributes
1st Oil Groove 2.00
1st Oil Ring Material HT IRON
1st Oil Ring Surface Treatment CHROME
2nd Groove 2.00
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2D7299
California Proposition 65 No
Engborein 3.307
Engboremetric 84.00
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 00075538374916