i call for a price check on a true 3" dual from headers back and they said that it cant be done but they can have the duals run to the back axle and it has to go into 1 to go over it. but they said they can true dual that will come out infront of the back tires has anyone tried this? i want a nice gurnt to it not to sound like a weedeater like a honda and its going to be on a 305 H.O. trans am and i need some advice

 

There Is Just No Room To Run True Duals On A 3rd Gen.

 

It can be done but you will have to find a different upper Panhard bar

Honestly for a 305 you do not need 3 inches. 2.5 Will be more than enough.

Also with 2.5 you do not have to do anything different and THEY WILL go over the rear axel on the passanger side.


Proof

 

Right. Those are clearly 2.5"... 3" is really pretty tight as a single. Dual 3" could probably be made to work by someone really good but if i owned a shop I'd stay away because of the hassle and time involved unless I knew that the customer was willing to pay way too much (to cover the time fussing with it) for something that would likely never fit quite right. A lowered pan hard brace or dumps before the axle would help enormously

 

many have.


im in the middle of it know its just incredibly hard. i have it mocked up now with flexible pipe, there is room to go over each side of the axle like a traditional dual pipe setup. mine will have the mufflers where the stock tailpipes were and i will be able to get the tank down without messing with exhaust

 

Yup, your exhaust guy is correct, you can't do dual 3" exhaust over the axle, thru 2 mufflers and have 2 tail pipes at all.https://www.thirdgen.org/forums/post...3-post428.html



Buuut to do it properly you'll have atleast, atleast, $1,000 - $2,000 to have it done correctly.

Most will not take the time to do it right.

 

ok well i wanted 3" because i ordered a 350 engine for it but he said something about running them out the side in front of the back tires have anyone of you done that before or would know how it would sound

 

A good quality single 3" catback with dual/single tail pipes will be just fine for your needs.