I have 3 inch exhaust back to some flowmasters and they are 3 inch in and 2 1/2 inch out when I bought the car it had dumps on it and it was way to loud to drive so I took it to a muffler shop to get the rest of the exhaust put on it. I dident relise at the time that they put 2 1/4 tailpipes on it wich defetes the pourpose of starting out with 3 inch. My question is, is there anywhere where I can get 3 inch mandrel bent tailpipes for my 89 gt stang? they are the pieces that go from the muffler over the rear axel and kick down right before the rear bumper. I want to get these because I want to get some 3 inch in 3 inch out mufflers. What muffler would you suggest, I was thinking with flowmasters but I kinda like the warlock race mufflers that you can take the 3 wingnuts off and remove that little plate to make them like open headers. Thanks Nick

 

Doesn't flowmaster make a 3' cat back? Check their site.

 

how big is your blower?

3" isn't really optimal exhaust till you hit 450+ hp. otherwise your killing yourself.

 

unless you have like a super charger or nos, i would take the 3" exhaust off and go with 2.5" exhaust. otherwise your not getting any backpressure and thats not good for your motor, me i have 2.5" exhaust coming to 3" tips but im going to put 3.5" tips when i pull my motor and rebuild it sometime during the summer.

 

The no back pressure hurt your car is a myth, you will still have a small amount of back pressure with 3 inch pipe. What really happens is that you shift the power higher in the RPM range.

 

maybe a myth, maybe not, black snake is who told me that & i trust him so im sticking with 2.5"

 

What can hurt your enging is running open headers for a good amount of time.

 

It's OK I don't know anything anyways.
On an otherwise stock car (ie stock valve springs and such) your right it might hurt over a long period of time, but you would have to daily drive it for a long time.

 

most people do daily drive, and im not doubting you man, im just saying i trust black because hes my homie. lol nothign against you though man. and im keeping my car otherwise pretty much stock other then the few mods im going to do to it when i take it out to rebuild it.

 

The daily drive comment was about OPEN headers not 3 inch. I do however agree that you car does not NEED 3 inch pipe, but it is a fact that the no backpressure thing from 3 inch is a myth plain and simple. I haveheard it before and it stems from old timers from the 60's who did not know any better. Like I said it will move you peak power around a little bit but it will not ever hurt the car. Sorry if I seem stubborn about this but I hate when mis-information and myths are posted here, it happens way way too much and I am getting quite sick of it.