NPI Catted H-Pipe ??s

I got a few questions about catted h-pipes. And before y'all even say it, off road mid pipes are outta the question (passing emissions, too loud, smell, etc.)

1. Will a catted h-pipe for a 99-04 GT fit a 98 GT? How much work would it take to make if fit if it wont? And also, anyone know how strict the laws are in NC and if I could easily pass w/ a catted h? I've been told that I can, but I'm not sure just how much I believe them.

2. How will a catted h-pipe w/ chambered Flows sound vs. the stock midpipe and chambered Flows? Not that this matters too much, I wouldn't mind to know. If anyone has a video or sound clip of this set-up, preferably on an NPI Stang, it would be greatly appreciated.

3. How will a catted h affect performance vs. stock midpipe? Will I get much out of it, or is the catted pipe a waste of time and money? I hear some of the 99-04 crowd saying it isn't worth it, but they sometimes forget they only have 4 cats stock, I have 6....Talk about restrictive.... I would think I'd get a nice gain, but hey, I really don't know.

4. Would the catted h need to be tuned for? I'm getting custom tuned sometime soon. Would it be better to get it on before the tune? Or can I wait till afterwards and tune for it using the user-adjustable features of the X3 programmer? Or would it even matter?

Summary: Is a catted h pipe worth it? And if it is, would it matter if I put it on before or after a custom tune?

Thanks for the help.

-Will

Thanks, Squeak. Questions 1,2, and 3 are now fully resolved for me. However, concerning the tune, lets say I get a custom tune next week (a very good possibility) and then put on a catted h-pipe sometime after, probably sometime later this month. Would this change the air/fuel or something that it would be better if it was tuned for? If it does change something, could I edit it using the user adjustable options on the programmer? Or, as you said, it makes no difference and I don't need to worry about it.

I ask this only because I didn't think I needed a tune for PI cams and intake, but apparently I do. I don't want to put it on after the tune and then not get any power out of it.

I'm pretty much done modding my car as far as power goes (minus the catted h pipe) and I just want to be damn sure everything is right before I get a tune (my final mod). Thanks for the help guys.

-Will

Thanks a bunch.

-Will

Hey, sorry to resurrect this thread, but I figure its better than making a whole new one. Does anyone know of anywhere to buy a catted h-pipe (for my car, a 98 GT) made for shorty/stock headers other than MRT or JBA? I'm not going to pay $500 plus for a mid pipe. Or is there some other option? I really would like a catted h, but I can't seem to find anything other than catted x or off road.

Thanks!

-Will

Anyone?

-Will

Alright, thanks for the advice, Twista. I'm honestly not as worried about loudness as I am power. Flows with an off-road H is too loud for me for a daily driver, so that doesn't matter much. And about the cats, I would certainly think that only 2 cats would be a good bit louder than the 6 I currently have. My granddad's 01 completely stock (with 4 cats) was about the same as my car with the stock mid pipe and 2 chamber flows. But now it has an offroad H and 2 chamber Flows and it is LOUD. So my thinking is that a catted H with 2 cats would be close to halfway between what I have now and what my granddad has now. Which would make me very happy. But I can't find any catted H pipes...

-Will