Got an HKS twin turbo kit, the downpipes are 2.5"... Im doing a custom 3" exhaust, what will be the best way to go about this?

use 2.5" test pipes (cant find 3" test pipes)

or just start the 3" exhaust at the hks dp's

 

Check with one of the shops on here....You can get any size down pipe you want ....may it be 3.0 or 3.5.......they have it.

 

and any decent muffler shop up some downpipes in 3"+ that go straight to your exhaust

 

AAM has 3" pipes, I have them on mine.

 

Fast Intentions does as well

 

awesome replies everyone!!! thanks. im prolly gonna pick up a set of 3" test pipes and then custom build 3" true dual exhaust.