Originally Posted By: oilboy123
Did the exhaust manifold warp, or what was the problem?
instead of using regular intake manifold to cylinder head gaskets, Dorman uses o-rings around each inlet trumpet. they are not serviced separately through Dorman supposedly and they lock you in to buying a new intake. also the plastic they use does not seem to be as durable as the OE Ford one, the shop i worked at before dealt with a lot of high performance mustangs and i saw more than a few where the main chamber was blown out during boost. the ford ones will blow out too, but usually at higher levels.