FITS DETROIT DIESEL DD15, DD16: This aftermarket replacement cylinder head gasket kit is a direct fit for Detroit Diesel DD15 engines from 2008 onward and DD16 engines from 2011 onward, compatible with Freightliner Cascadia and Western Star 4900 and 5700 series trucks
COMPLETE UPPER ENGINE GASKET SET: Engineered as a complete upper engine gasket kit covering the full cylinder head and upper engine assembly interface points of the DD15 and DD16
ENGINEERED FOR DD15/DD16 BORE DIMENSIONS AND COMBUSTION PRESSURES: The cylinder head gasket is the primary sealing component between the cylinder head and engine block, managing combustion chamber pressures, coolant passages, and oil galleries simultaneously. This kit is dimensioned and pressure-rated for the DD15/DD16 bore profile and compression requirements.
HEAVY-DUTY GASKET: Each gasket in the kit is manufactured from materials selected for the specific sealing demands of Detroit Diesel DD-series engine operating conditions — including the combustion temperatures, coolant system pressures, and oil circuit requirements of Class 8 long-haul diesel operation. Direct-fit dimensions ensure correct seating at every interface point without modification.
CROSS-REFERENCE NUMBERS: Compatible with applications referencing A4720162120 and 631375. Verify your engine series (DD15 or DD16), engine serial number, and model year against your service manual before ordering