Dorman делает тюнинговые впускные коллектора только на 4.6 (( Но есть проствки для использования тюнинговых коллекторов от 4.6 на 5.4.
Adapt your manifold with Professional Products intake adapter plates.
These Professional Products intake adapter plates are designed to allow for the use of a 4.6L, 2V intake manifold on a 5.4L, 2V V8 engine. Many Mustang owners are swapping the larger displacement 5.4L engine into their Mustangs for some extra oomph, but there is no performance intake manifold available for the larger engine. These Professional Products adapter plates, gaskets, and hardware now allow for the use of any aftermarket 4.6L, 2V manifold on this engine.
Вот думаю подойдет или нет ?