identify these couplers

[airFS]

I already have the pipes, but whenever I bought them they didnt come with any couplers and I cant figure out what size they are.

http://www.extremepsi.com/store/customer/product.php?productid=16451&cat=383&page=1&veh=2G DSM

 

[s3v3n]

If you already have the pipes but just need to know the coupler diameter... why not just measure your piping diameter? Then you'd just need the reducers for your TB/IC. Maybe I'm completely misunderstanding the question though

 

[11sec_GSX]

If you already have the pipes but just need to know the coupler diameter... why not just measure your piping diameter? Maybe I'm completely mis-understanding the question tho

That's what I was thinking....If you already have the pipes what is there to figure out? Just measure.