Im looking to get a UR test pipe, but not sure what size. Im currently running stock exhaust, but would like to get an nice turbo back when I can. Prolly wont be for quite a while. What size test pipe will fit the stock setup?

 

3.0 everything as far as the exhaust is concerned, never get 2.5 as it'll just choke your car.

 

So the 3" UR Test Pipe will bolt right up to the stock exhaust?

 

Probably not


Just buy a turbo back exhaust, 3.0, make sure that there are no tapers down to less then 3.0 inches.

 

Thats the problems, I need to hold off a while on the turbo back exhaust and need to know what size will bolt up to the stock....

 

3 inch

 

well if it's going to be a while before you complete the system with full 3" pipe then I suggest going with the 2.5" UR test pipe, the 3" just will not mate up properly to your stock downpipe and catback, my 3" UR pipe leaked like a biatch when I bolted it to my stock downpipe.

 

hmmm.. getting mixed answeres here.. I know the bigger is better, I take it the 3" is better if im getting a 3" exhaust to match up with, but the 2.5" is what I should go with for fitting to the stock exhaust which I'll most likely be using for a while.

 

Basically I need to know which size will bolt up correctly to my stock downpipe and and catback. Are the stock DP and CB 2.5" or 3"???

 

2.5"dp
2.5" tp
3" cat back

this is the "optimal" exhaust for "stock" turbo.

 

Yes it will. Last winter I ran a 3" testpipe and mbc only in my car.

 

Im so confused now... what are the sizes of the stock down pipe and stock cat back?

 

How does a 2.5" TP bolt up to a 3" cat back if the sizes are different?

 

I wouldn't try the combo that 4-bngr suggests. David Buschur recommends 3" all the way

 

Ok, the stock exhaust is 2.5". The 3" delete pipe will NOT seal if you mate it up with the stock downpipe and catback. I am telling you this out of experience. I ran my 3" UR test pipe for about 6 months with a 3" cat back and the stock downpipe. I leaked every day where it mated up to the stock 2.5" downpipe no matter what I used for gasket material. The differences between the diameter of the two pipes leaves you so little room for a mating surface that it does not allow propers seating area for any gasket material you use in between them. Now factor in that your exhaust WILL shift around a bit and you have the perfect recipe for a very bad exhaust leak.