HELP!! AFR 185s + MAC longtube = NO FIT!!!!

mint93GT · Dec 30, 2003

I got the headers in ok......well, it was a PITA but I got them it. I cranked them down then went to install my Prochamber.......and it DOESNT FIT!! Measurring as best I could from the centerpoint of the holes in the headers...from header to header is 16 inches, but the prochamber centerpoint to centerpoint is 14.5 inches. What am I supposed to do....FORCE IT!? I don't think it'll go...please help.

billetunderwear · Dec 30, 2003

hurray for Mac products

Maybe it's time to bust out the torch.

JadeFalcon · Dec 30, 2003

I have mac headers. I also have a dr. gas or spintech X-pipe, which is weld together, it went right in without an issue

I think you may have an issue with primary size, do you have 1-5/8" or 1-3/4" primaries?

mint93GT · Dec 30, 2003

Not sure what I have...going to go back and try and find my invoice. WHat effect can the two different size primaries have on where the headers end up underneath the car?? Thanks for the speedy replies too!!

mike keirstead · Dec 30, 2003

Drive it open headers.........

mint93GT · Dec 30, 2003

Drive it open headers.........

Uhm....no. Not a good idea.

mike keirstead · Dec 30, 2003

I know i was joking.....just take it to a muffler shop and get them to bend the h-pipe to fit the headers. Wont cost to much. It will save you from destroying things. Ive driven my car open header to the muffler shop 3-4 times. If the cops pull you over tell them your on your way to the shop and they will let you go.

JadeFalcon · Dec 30, 2003

the size of the primaries effects how the collector will be positioned. I know that 1-3/4" MAC LT's fit spintech/dr.gas x-pipes damn well.

mint93GT · Dec 30, 2003

I'm going to thread the Prochamber through the hangers tomorrow and squeeze under the car to take a digital picture, so you can see the deal. Now, I have no problem taking the car to the shop to have the Prochamber bent to fit....but my point is...it is a complete MAC system. I would think there is enough research in their design that this should be a no-brainer?? So I'm a bit confused that things don't fit....and what a buzzkill after those headers...I'm like YES, I'M OVER THE HUMP....oh darn, the Prochamber doesn't fit. Bummer

mike keirstead · Dec 30, 2003

yes that sucks, but when your done..............

Michael Yount · Dec 30, 2003

Yeah - before you start bending things, I'd get some part numbers and talk to whoever supplied the pieces for you. It's not uncommon for systems like that to be 1/4" - 1/2" off - quality control and MAC pricing don't exactly go hand in hand. But yours sounds like it's WAY off.

zss42002 · May 29, 2011

i know old thread but i am having same issue any solutions?

mint93GT · May 29, 2011

Ultimately I had the Prochamber bent to match my headers. Totally sucks, because it was supposed to be a bolt on system .....but I was overseas at the time too. If you have an opportunity to work with MAC and resolve the issue without any further expense to you ....I'd try that.

mint93GT · May 29, 2011

Plus.....that exhaust system was soooo obnoxiously loud ...I had to change it out. I couldn't take it any more. The one time I drove from Georgia to Virginia and back ....I wore hearing protection to keep from going deaf. It was bad.

zss42002 · May 30, 2011

did it hit the crossmember at all? my driver side header looks like its too far out and will hit the crossmember.

HELP!! AFR 185s + MAC longtube = NO FIT!!!!

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