ShowstoppaTransAm

hey i've got an 2001 ta stock automatic looking to go with true duals out the back. does anybody know what set up i need to do this? whats the biggest size that i can get over the axle? any good shops close to the southeast? i'm in ga. also i was thinking of going with either kooks or qtp headers what do ya'll think.

2000WS6TA

iTrader: (5)

you will have to have a muffler shop or fabrication shop make yu some tail pipes. you will need a adjustable panhard rod and relocation braket for it. and you can only get 2 1/2" over the axel.

jmm98LS1

iTrader: (28)

There's pics/info from people that have done 3" all the way back, so it can be done. It's not easy, and it's definitely not cheap....but it's possible. Doing 2.5" is easier though and unless you're pushing over 500hp it's sufficient. And like said above you'll probably need the phb relocation kit if you run them both over the passenger side.

brad8266

iTrader: (23)

I completely disagree that 500HP is max for 2.5" dual effiencey. There are 3" catbacks that are supporting well over 500HP in a single pipe. With 2.5" duals you have actually almost double the amount of flow area and thew X-pipe section also helps out.

Dont listen to people when they say that 2.5" duals are only good up to a certain HP. They are good for up to a lot more power than you will probably make.

jmm98LS1

iTrader: (28)

I never said they were only good up to a certain horsepower. I said unless you're planning on pushing over 500hp (guess I should have said "well over" 500hp, and I'm talking rwhp, not flywheel) that 2.5" duals will be sufficient. Hell, I've got 2.5" duals and will be making WELL north of 550rwhp on the bottle. I'm not worried about my exhaust restricting me.

Charlie@LsXperts

iTrader: (12)

sorry to hijack, but jim98 has inspired me to toss the bullets and get 1 chamber flows!!!!!!!!

Shallow Bay

iTrader: (3)

Ever thought about going under the axle?

brad8266

iTrader: (23)

ok, 2.5 duals are plenty for just about any amount of power that will ever see the street.

orangeapeel

iTrader: (18)

It will cost some bux, so just get ready to pay. I have my 2.5's go out the back, and they are flanged to dump pre-axle as well.

Strahley

iTrader: (4)

He speaks the truth

JEB Garner

I have true duals going over the axle and I did not have to have an adjustable panhard rod nor a relocation braket. That is silly. If the dual exhaust system is designed properly, both of the 2 1/2 inch pipes will go over the axle without any frame or suspension modifications. We designed and built an over the axle dual exhaust system for the forth generation F-Body cars several years ago with the idea of selling them through mail order. But we never offered it. Our dual exhaust system can be adopted to be used with stock manifolds and catalytic converters, short or long headers or just about any other configuration you might come up with. Maybe we should offer our "complete" dual exhaust system to all you F-Body car guys through mail order. Our dual exhaust system was designed to be the perfect exhaust system for the forth generation F-Body.

SmokeySS

iTrader: (7)

Well what you've said sounds a lot better than the stupid ebay kit.

TheBlurLS1

iTrader: (8)

Check the link in my sig.

Under the axle is a great alternative. I have absolutly ZERO problems with mine, plus I think it looks kinda cool from behind having the pipes come from beside the chunk and turning up.

That thread has all the information/videos/pictures/$ figures involved with my system. Pages 2 and 3 have more pics.