K so I believe the stock exhaust is 2'' piping.

My problem is I need to expand it to 3'' for the exhaust tip to be welded on. Just wondering if it is possible to expand the pipe a whole inch without it cracking? And if so would just about any muffler shop be able to do it for me?

 

what king of vehicle do you have. and I believe that the stoick is 1.75'' piping. If yours is not a turbo, i wouldnt go to 3''. I would stick with 2.25'' or 2.5''. ( i prefer 2.5'')

 

Stock for a 2.2 is around 1.75. Unless you're going F/I, then the highest I would go would be 2.5".

 

yeah 2.5" even seems a lot for NA unless you are running meth and tuned like crazy with full bolt ons. Isnt the SC GMPP ehxaust 2.5? geepers...

 

don't do it!!!! For the love of all that is holy, don't do it!

 

lol i think you guys misunderstood the question...

I'm not talking about turning my whole exhaust into 3'' piping, I'm just putting a 3'' tip right on the end of the exhaust (I just want to expand it to 3'' at the last like 4 inches of my exhaust so i can weld the tip up which has a 3'' whole on it).

I was wondering if expanding the current piping which is 2'' to 3'' would crack it or is it fine?

 

it a lot to expand. go slow and check how it reaction to expansion

 

weld a reducer on backwards?..lol

 

Well im just gonna take it to a muffler shop, hopefully they dont charge me an arm and a leg to do it

 

Ohhh well hopefully the end isnt weakened to much then, cuz that tip sounds huge and may break off

 

This is what a reducer is for...

 

this.

/thread

 

There is no SC specific GMPP exhaust...it is all just Cobalt exhaust.

And it is 2.25"

 

you think a muffler shop would have trouble expanding the pipe for me?

 

aanyone know

 

x356 !!!!!!!! you would think after all these years, and all of the exhaust threads, everyone would know the correct size of the GMPP exhaust.

 

Pssst.


99% of the people on this site are speds.

 

I dont know why they need to expand the pipe... They have other ways of getting it on there...

 

how else would u get it on there with out expanding the pipe?

 

idk, call a welding shop near by and ask.

 

That reverse reducer bit that's been beaten to death already in this thread.