I bought a 92 civic hb with a 99 GSR engine swap in it. I just went to install my new Apexi WS exhaust system, and the exhaust system is about 3" away from bolting up to the GSR cat. I would prefer not to modify the catback exhaust system. I do not have an exhaust shop readily available to just make me a test pipe, they refuse to do it. Are there any test pipes available out there for this application? Thanks.

 

Is this what I am looking for? It appears it has a removable center section.

http://www.omnipowerusa.com/Pr...e.asp

 

From what I read on here, this test pipe only extends to 18", I need 21". Can anyone verify how long the testpipe is?