I have an exhaust question for you guys...Since the 5.4 and the 4.6 are similar in dimensions, are the exhausts interchangeable...for instance, I found a set of aftermarket LT headers, Cats, and Y pipe for a good price...but it says it is for a 2004-2008 f150 with the 5.4. I have an 2007 4.6. Will it fit?


Here is the Link

Thanks

 

Should fit the headers I know will so everything else should. They both are basically the same engine just different bore and strokes pretty much. But headers will interchange. The rest of the kit is indifferent to the engine. Just 4wd and 2wd

 

Im curious about this too! Let me know us know what you find out!

 

In short if your truck is the same as the description jut has the 4.6 instead then yes it will

 

The 5.4 has different heads its a 3v i think the manifolds may be different. But who knows i have no first hand experience

 

5.4 and 4.6 will not interchange because of the head differences. If they were interchangable a lot more 4.6 would be putting them on as the 5.4 are much more available.

 

A lot of headers state that they are interchangeable from 4.6 to 5.4

 

I noticed that, but some like JBA have different part numbers for the different motors...wonder if the fitment is the same, but maybe the primary/collector design differs slightly. Like a slightly larger primary for the 5.4? I may have to test this theory out for Christmas

Funny thing is that I was just on Summit and was looking at the same pipes...lol

 

For the money I'd love to have a set. Depending on my check this week I may order some.

 

Pacesetter has 2 different PN on their site for the headers. Heads on the 5.4 are also going to sit higher in the engine bay as the deck height is taller.