i have a jdm itr 4-1 header and apex n1 catback where can i find a test pipe/resonated test pipe in the right length that will bolt up. I have searched but cant find a definite answer. FYI the car is a 00 civic si.
any help on where i can pick one up and have it shipped asap will help a ton.

 

Omni makes a test pipe. If not just buy the 2.5" collector and go get some pipe at your local exhaust shop and fab up your own.