After a lot of research i don't see any other long tube headers better than Dynatech Supermaxx on the market today for a 5.4 3V 4X4. Expensive but very good quality, also comes with 2 high-flow cats.

 

Bout time somebody bought these..

Tell us how they work/sound.

 

Sounds good let us know what u think.

 

Nice.

1. Do they sell the cat pipe by itself?
2. Where are the O2 bungs? Does it have as many as stock does?
3. Any ideas on if it will pass a sniffer test or set off a MIL?


Where did you buy it from?

 

Do a Research on their site:
http://www.dynatechheaders.com/

 

Hay they look very nice!!
I gotta get me a set of them.

Phil

 

I've had mine for near 2 years now. Cats rattled out after a year. Nice system but I would have just bought the headers and custom fabbed the Mid pipe and high flow Maggie cats. (2V 5.4)


edited: replaced Y pipe with mid pipe

 

Ya thats what I was thinking.Just get the headers.I have high flow cats and I don't need the Y.I like my duals.

Phil

 

Forget the y phil,
Get the setup for the L or the Harley,Duals all the way back..

http://www.rpmoutlet.com/lightaccufabcast.htm

Yo can also get the headers alone since you got the highflow cats

 

Will these mount on a 4x4 '06 LT? I'm looking for a header and exhaust package but need it to fit on the 4x4 version. Is there anything available? Thanks!!

 

I am the one who started this thread and bought that dude and my truck ia a 4x4 Mark LT too. Keep in mind that everything in the world that fits a 2005 f-150 supercrew 4x4 will fit our trucks.

 

Rafa, I'm sorry. I saw how your truck looks lowered, and I just assummed it was a 4x2. I didn't catch the 4x4 in your description. Sorry, my ignorance. Did you have any problems or clearance issues on your 4x4? I was looking at the Gibson shorty headers, however I always thought shorty headers with unequal tubes did not offer too much of an advantage over stock. Any opinions?? Thanks!!

 

Rafa, did you ever get your custom tune done by Mike T? If not, after the header install would be a perfect time since the LT's tend affect your tune.

 

What do you mean for "LT's" ???

 

Long Tubes!