Well IF my cats are bad, this is what i am thinking about doing, need ya'lls thoughts..

Magnaflow performance Cats
Straight pipe to gibson muffler
straight pipes to gibson tips straight out the back.

Basically get rid of all the bends/curves of the original gibson pipes, and go with pipes straight out the back..

What do you think?

My goal is to get a little louder and maybe a little deeper..

 

what size pipe is key?

also go with all magnaflow mufflers/cats :)

 

What size pipe are you gonna run?

 

I have NOOO idea... And i already have this Gibson Muffler lol.. Its got like maybe 1K miles on it.. Whats the difference in sound with the Magnaflow? which one is best?

And what do you suggest for pipe size?

 

2" off the headers or exhaust manifolds to some cats. one per bank, then take it to the muffler in 2.25 or 2.5 then come out of the muffler in 2.25 or 2.5

 

3". If the diesel guys run it, gotta sound good on a 4.0 right?

 

I agree with Mr Beard. I'd probably go with 2.5" from the cats back

 

would it be a good idea to run 3 inch pipe?

 

Not to my knowledge. It's just too big for the 4.0. I think some high buck exhaust for V8's run 3" and I know Diesels run even bigger (if I'm not having a total brain fart).

 

hmm. didnt think about replacing the pipes BEFORE the cats lol.. We will see what the shop says about my cats.. Im kinda hoping that they are bad, and they are whats causing my truck to run so bad..

 

At least you aren't going to go straight pipe. That would sound horrible.

 

yeah, not going straight pipe.. Want to keep the cats and muffler, there is a ranger around here with straight pipes, sounds like its got a dam honda fart can..

 

I like my truck straight piped

 

maybe yours sounds good lol.. this one sounds like straight up a$$..

 

hey zach, how much do you think is a fair price for getting this done, if the cats are bad?

 

Yeah but your truck sounds like crap. Only a V8 or a diesel should be straight piped.

 

haha burn.

 

Does Magnaflow make direct replacement cats with pipes for your truck? I know they make a new Y pipe with cat for my year.

 

um, im not sure.. its two cats.. heres a link..

MagnaFlow 23541 - MagnaFlow Direct-Fit Catalytic Converters - Overview - SummitRacing.com

 

That is what it looks like. Bolt in and go. Just make sure they are legal in your state.

 

yeah, except i could have sworn it said it was a performance cat lol.. guess its just a OE replacement.. Think it would still add anything power/sound wise?

 

Yeah your right. MBRP makes a 3" kit for the 5.4 V8. Normally the diesel is 4" or 5"

 

I'm sure its their high flow cats. Email them to be sure. If they are then the sound may be louder but I don't think you will gain any power.

 

If your stockers are clogged up you'll gain some power back but I wouldn't keep my hopes up for a lot of extra power. If clogged cats are your problem though you'll notice a difference with them. But Magnaflow or OEM would be about the same

 

yeah.. I wish there was a sure fire way to check my cats myself.. Without having to take it to the shop lol.. Im mainly looking to gain back all the power/sound i have lost since my truck started running like poo.

could clogged cats cause my symptoms?

Makes sense, Runs Ritch as hell( computer would be trying to compinsate maybe?), and its quiter than it used to be. and there is like NO power