Gasket bodies are made from steel perforated sheet metal covered in graphite composite material with aircraft stainless combustion rings.
Applications: 2003-2004 Ford F-Series pickup and Excursion with 6.0L Power Stroke diesel.
Stud Update: We have tested these gaskets with ARP head studs and found no extra sealing performance gain over factory bolts and our gaskets. If used, ARP installation instructions must be followed.
Stacking of boxes will also fail the gasket. This means using an in-line programmer along with programming the factory PCM. This is due to the extreme timing advance that is produced by both modifications.
Warranty: There is no warranty with this product, if the kit fails it is due to installation error or operator error. If you have more than 500 BHP or stack boxes the gaskets will fail. We have hundreds of hours of testing and they do not fail when used in the manner which they are designed.