2001 - 2004 GM 6.6L LB7 Duramax casting # 687-3
Casting 587-2 86F1 Same size intake ports
If you are unsure of your engine year, please give us a call. If in doubt, match your casting number.
2001-2005 GM Truck 2500, 3500 6.6L Vin: 1 or 2
Note: does not include head bolts / head studs. When choosing Upper Gasket Set refer to your VIN #'s 8th digit. 1 = LB7 (2001-2004.5) and...More Details »