Mac Prochamber w/cats ? Please Help

NeverDoneGT · Dec 12, 2005

I have a 2002 Mustang GT 5 spd w/ a Flowmaster 40 Series Catback and i want to make it louder by adding a Mac Prochamber w/ Cats.

1) Will it make my car run too lean or mess up my A/F ratio?

2) Do i have to get Mil Eliminators?

I just dont want to get it and make my car run like crap, so i would appreciate the help

thanks alot

03ghoststang · Dec 12, 2005

imo i would go with teh O/R prochamber and get the mil's for it

TrueBlue03 · Dec 12, 2005

your car will not be much louder really. it'll have a different tone, but it wont be that loud at all with cats and the chamber = 3rd muffler.
i vote with 03ghoststang. go with offroad prochamber or even an offroad H (for either, you should get MIL eliminators.)

NeverDoneGT · Dec 12, 2005

if i got it in o/r would i need to get it tuned due to the A/F or would it be fine if i just left it? Will there be noticable power increase?

thanks alot

Mossberg · Dec 12, 2005

No tune needed. Just get MIL elims. There will be an increase on the top end power. Get the O/R. The catted would be about as quiet as stock.

scupking · Dec 12, 2005

The procamber only has one cat per side. The stock H has 3 per side. So, the procamber should be louder then the stock H.

bgbg22 · Dec 12, 2005

What about the cats n inspection? I was thinking of getting an Prochamber also wit the cats for 409.99 or the prochamber without cats 239.99. Theres a huge difference, but i dont wanna fail inspection in New York State. for 00-02 gt.

NeverDoneGT · Dec 13, 2005

ya im stuck on what to do here. hey mossberg how does your car sound ? is the drone bad when your crusin?

thanks

robg860 · Dec 13, 2005

I had my UPR catted x-pipe put on today, and it was waaaaaaaaaaaay loud. I put the silencers in from bassani to soften the noise. The main problem was a strong resononce in the cabin at 2000rpm that vibrates the hell out of the inside of the car!!!!! Totally different and meaner sound though!

BooWFO · Dec 13, 2005

Pretty sure your not suppose to replace cats on a car with less than 50k miles or 5 years old, might be more now check EPA. So that alone may throw a monkey wrench in there. Also do any of the catted mid pipes have CARB or EPA apporval?
Anyway's I'd do an O/R midpipe either a programmer or mils and just switch it back out for inspection. I mean it's only 8bolts, and if you get plug and play mils 2 connections.

03ghoststang · Dec 13, 2005

BooWFO said:
Pretty sure your not suppose to replace cats on a car with less than 50k miles or 5 years old, might be more now check EPA. So that alone may throw a monkey wrench in there. Also do any of the catted mid pipes have CARB or EPA apporval?
Anyway's I'd do an O/R midpipe either a programmer or mils and just switch it back out for inspection. I mean it's only 8bolts, and if you get plug and play mils 2 connections.

even if it has cats sometimes they wont pass because they come with high flow cats. I live in california and i will have to bolt up the stock H-pipe in order to pass emissions testing so it's a good idea to have it laying around in the garage for that reason

03ghoststang · Dec 13, 2005

scupking said:
The procamber only has one cat per side. The stock H has 3 per side. So, the procamber should be louder then the stock H.

that was on the 96's on these their is only two per side equaling 4 cats on the stock pipe

Dark Knight GT · Dec 13, 2005

I have Mac long tubes, Mac prochamber w/ mac cats welded in and a Mac catback. It's not super loud, but then again, my ears have adjusted, so...........

Red03Mustang · Dec 13, 2005

I have a MAC cat-back with Magnaflow catted X, and it's definitely louder than when the stock mid pipe was on it. I have a 4.10 rear also, so the drone is loud at 55-60 mph driving, which is where I am most of the time. Nice sounding going down the road!

meade01 · Dec 13, 2005

If you install an after market catted mid pipe, do you still need to use MIL eliminators?

03ghoststang · Dec 13, 2005

meade01 said:
If you install an after market catted mid pipe, do you still need to use MIL eliminators?

its recomended that you do so you wont get the CEL on

Stang|ess · Dec 13, 2005

Ignore the above guy.

Mils are needed for midpipes that do not come with cats, so if you were to get a new catted midpipe, your cel wouldn't come on.

'13_ImpactBlue_GT · Dec 13, 2005

03ghoststang said:
imo i would go with teh O/R prochamber and get the mil's for it

+1 for teh o/r pc

meade01 · Dec 13, 2005

Stang|ess said:
Ignore the above guy.

Mils are needed for midpipes that do not come with cats, so if you were to get a new catted midpipe, your cel wouldn't come on.

Even if the new one has only 2 cats?

TrueBlue03 · Dec 13, 2005

scupking said:
The procamber only has one cat per side. The stock H has 3 per side. So, the procamber should be louder then the stock H.

But the chamber is just another muffler on the car. I've heard 2 people tell me so far that adding a catted prochamber wasnt any louder than the stock H and if anything, it quieted it down a little.

Go offroad PC or H and get some plug and play MIL Eliminators.

Mac Prochamber w/cats ? Please Help

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