if you're wanting straight pipes (no mufflers) be sure to go with true duals...it sounds a lot better than a Y pipe with dual tailpipes..

ShiftFMX's truck is pretty close to what you'd have, but true duals are louder and more pronounced. I have them on my 98 4.6 with 2.0" pipe, tips out under the back bumper and it sounds really good, louder than ShiftFMX's, but of course not as raw as the open headers. And yes it does turn heads, as silly as it sounds ive been asked if my truck is supercharged, built, etc. My truck is completely stock, nothing special.
Give true dual straight pipes a try, youll like them.

 

Thanks for all the ideas! No straight pipes. Heard that police are cracking down on exhaust. I dont want to do headers or mess with the cats till Im out of warranty. It will be a while!

 

i dont think you'll have a problem with straights; they're loud but not so loud that a cop would pull you over.
Ive had mine for 4 years and havnt had the first problem.

 

or the Cherrybomb extreme, same basic design as the flowmaster 10 series. Had one on my old 93 f150 5.0 and that thing growled deep and loud.

 

I agree. I don't think you'll have a problem running no muffler. The cats will keep some back pressure and quiet it down. No muffler is going to be that much louder than a Flowmaster Original 40 though. If anything run 2.5" true duals with Flowmaster Original 40s, if you're not going to do straight pipes.

To all of the guys who are saying run no cats, this is a 2006 F150 not a damn 1987 F250. Cats are necessary, end of story.

 

for some reason i thought you had cuts your cats? maybe it wasnt you.

Mine is a 2004, it has 4 cats. im thinking of removing the back 2. i know several people have done this.

 

Nope that was Josiah. But yes if you have a 2004 than you have 4 cats and the rear set can be removed since they are after the 02 sensors.

 

oh so i wont need to relocate the O2s? sweet so no codes will be thrown, ill be sure to get that done soon.

 

I don't have my truck right now so I cant look. Do the 05's have 4 cats or just 2? Also is the factory exhaust stainless or aluminized?

 

I believe the 2005s should have 4 cats unless its a really early model 2005.

 

Mine is a very early '05. Lariat with no MP3! Build# is 15,xxx.

 

It wont hurt anything to take off the cats if you put in O2 simulators. but it will void the warranty

 

did that on my 97. smells alot better to i think i posted the o2 sims on here somewere. from RPM outlet. they work been running no cats for about a month and no codes came up so my "cats" are working fine...just dont tell my computer i dont got any

 

Ok listen, if you take off you cats or run staight pipes or gut your cats, your in serious trouble. By doing these things, your vehicle will lose backpressure which is critical to how such sophisticated cars and trucks of today run. By taking away backpressure, you can damage your engine, just do a little research on this fact.
I would recomend that you run an SLP Loudmouth cat-back system. You will get deep, LOUD, and aggessive tone. Trust me my brother got in on his GT and we could hear him start up and drive from the little auto shop at wall mart all the way from the main enterance. Also you keep back pressure but you can pretty much run stright pipes back from the cats becausre in this system you can get the racing mufflers that are just hollow tube that looks like a muffler so that it will pass emmissions. Trust me this is a great and loud buy!

 

Do they make a Loudmouth kit for our trucks?