Mid-pipe

Youtube potential interests and work from there. I know with the flowmasters the O/R X was almost too loud but didnt actually cross the line. H will be a little smoother since it has somewhere to mix. UPRs x pipe fit okay but of course can still be a pain to put on. I think even here in mississippi not having cats is illegal (not sure on that) but its one of those things that if you're not being ridiculous they dont really care

H and Flows sound good, real good. Even though I am running an X pipe with MAC mufflers (chambered, like Flowmasters), I don't generally like the sound of a non-catted X on 40 series Flowmasters. It isn't horrid, but it's also not my cup of tea.

BBK and MAC both make a good H pipe if you are having trouble finding any.

As far as getting in trouble for no cats, that depends on the state. I would say California is by far the worst when it comes to that. In my state we don't even have vehicle inspections nor do we have emissions testing, so it's pretty unlikely that there would be an issue... matter of fact, I've never heard of someone getting a ticket (doesn't mean it hasn't happened) because of no converters. It's usually a noise violation if the exhaust is super loud.

As far as MIL's, I believe they have been outlawed pretty much. No one sells them anymore, new versions of handheld tuners are not allowing the o2's to be shut off from what I hear either. They are possible to make for REAL cheap though, and there are some diagrams floating around online...

I just went through the same process lately, and decided on going with a MAC O/R H-pipe. cost me 160 shipped from stangmods, they have a couple left apparently, because i called MAC and they don't have any themselves lol needless to say its kinda hard to find a decently priced o/r h-pipe, but from everything ive heard it sounds pretty sick

my buddy has an 07 GT with flows and an x pipe, and it sounds good, but not as good as it would with an h, its just too raspy

Like someone said above, it is illegal anywhere to remove factory installed cats on a pollution controlled vehicle, HOWEVER, it really depends on where you are from whether that's a big deal or not. where i live there's no emissions testing or whatnot and i have never heard of anyone getting even a noise violation unless its something ridiculous like open header lol my buddies have been runnning around with o/r midpipe setups for over a year so far and everything is good

it will be louder, but itll sound pretty sick with an H pipe. an x with flows just doesnt sound as good as an h imho now an X with some slp lmII's or borla stingers sounds sick, but not with a flows.

if you really want a pypes X, check out Mustang Parts & Performance - American Muscle they got it for ~$160 IIRC.

BurningRubber said:

H and Flows sound good, real good. Even though I am running an X pipe with MAC mufflers (chambered, like Flowmasters), I don't generally like the sound of a non-catted X on 40 series Flowmasters. It isn't horrid, but it's also not my cup of tea.

BBK and MAC both make a good H pipe if you are having trouble finding any.

As far as getting in trouble for no cats, that depends on the state. I would say California is by far the worst when it comes to that. In my state we don't even have vehicle inspections nor do we have emissions testing, so it's pretty unlikely that there would be an issue... matter of fact, I've never heard of someone getting a ticket (doesn't mean it hasn't happened) because of no converters. It's usually a noise violation if the exhaust is super loud.

As far as MIL's, I believe they have been outlawed pretty much. No one sells them anymore, new versions of handheld tuners are not allowing the o2's to be shut off from what I hear either. They are possible to make for REAL cheap though, and there are some diagrams floating around online..

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Americanmuscle has them in fact, i just bought a couple of splice-in MIL's from them for and i got them in the mail yesterday they disappeared for a while because they were deemed illegal, but they're back now lol they got the plug in MIL's too.

also, if you frequent any other mustang forums, look around the vendor forums for americanmuscle, i got a SICK discount on these splice in MIL's ($18 SHIPPED) lol just trying to share the opportunity.

good luck man

go with o/r x or h.

and i have to admit, flowmaster do sound better with an H.

and yes, it is illegal for an o/r midpipe, that is why you should keep your stock one.

and as long as your not making your presense known everywhere you go with your car, there

should not be any reason for the cop to pull you over. but it is still illegal.

i also live in ohio and know a few mustangs with no cats... also a few other cars with no cats and none including myself have ever been pulled over for it. I've had 2 different mustang with no cats and never had any problems. Currently running a upr x i got off ebay for about 150$ fits just fine

eliteJAE said:

Americanmuscle has them in fact, i just bought a couple of splice-in MIL's from them for and i got them in the mail yesterday they disappeared for a while because they were deemed illegal, but they're back now lol they got the plug in MIL's too.

also, if you frequent any other mustang forums, look around the vendor forums for americanmuscle, i got a SICK discount on these splice in MIL's ($18 SHIPPED) lol just trying to share the opportunity.

good luck man

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Awesome, glad to hear that.

X-pipe FTMFW. I have one and when i had my flows it didn't sound THAT bad. I can't stand flows anymore though.