i have a 06 5.4 fx4 and have a magnaflow bullet and i like the sound but just want it to be louder...i have been recommended to get hi flow cats...i want them but dont want to dish the money out right now so i have been thinkin about running a straight pipe dumped or duals coming out behind the tires with some big tips just wanted everybodys advice to what i should do and what exhaust would sound the best and the loudest.................http://www.youtube.com/watch?v=f1zGUdRNxmo love this sound

 

Yeah that truck sounds good, but hes running a Diesel exhaust, which I cant imagine being too healthy for the engine. I thought it was a Flowmaster at first.

If I were you I would just save for the cats, $120 is about all you would need.

 

id say go with hi flows, but if your thinkin straight pipe cuz your maggies not loud enough, then either go with a straight pipe set up, or (i hate to say this) cut the cats off....AAAHHHHH.....or get a louder muffler

 

Dont you dare suggest no cats!

The hi-flow cats will run about $55 - $75 each, theres 3 different ones you can choose from, the common one everyone uses, 94306, the same size cat but a bit louder, 94006, and the louder and shorter version, 94106.

If you were to want a louder muffler with still a deep tone, Flowmaster Super 44 would be my suggestion.

 

[QUOTE=DarrenWS6;3392534]Dont you dare suggest no cats! QUOTE]

 

dont forget you can take your cats to i think a salvage yard and get a nice chunk of money for them

 

how hard would it be to install hi flow cats myself cause the muffler shop quoted me 70 bucks a cat

 

Find a new shop. Shouldn't be more than $50.

 

or a single chamber!

 

or true dual single chambers

 

why can't you take your cats off? like all of them on an 05 f150? what will happen?

 

they start running bad, sound worse, mess up the computer, drop MPG's, and performance

 

I have an '05 FX4 5.4l and I want to run Maggie cats and straight pipes. What cats would you recommend. I am in PA so I just need to pass 49 state legal EPA. Thanks. I looked on Magnaflows website and the universal cats for that year are only 4.6l rated.

 

2 Magnaflow cats will operate properly on Ford trucks, part #s 94306, 94006, and 94106. The 106 is a 9" long body ( loudest ) 306 and 006 are both 12" but 006 is a hair louder. I would get 94306 for the way you want to run your exhaust.

 

Hey i ran my truck 1998 4.2L striaght piped for about 2 months and it just drank fuel my buddy was getting better mpg with with carbed 305 in his 87 K5 Chevy Blazer and its super hard on the valves due to know back pressure i have high flow cats in mine and a magna flow cans i love the love grumble yours should sound sweet with a 5.4 triton hope this helps
Kevin