best solution is the password jdm adjustabe test pipe, or the omni power adj. test pipe......best investment as far as exhuast go, they have 2.5 inch collector....any header, JDM or USDM....problem solved.
i got the password one nt to long ago and made my exhuast set up with my ITR header and catback, look and sounds flawless.
Yep, pretty sweet. Love that single sensor OBD1'ness.
I definitley recommend putting anti-sieze on the threads of your O2 sensor. When I went to take off the ITR to have the engine pulled for a rebuild, we couldn't get the O2 sensor out of the ITR header. We had to drill out the entire stock bung with the O2 still in it, weld in a new bung, and by a new O2 sensor. You may be able to tell in my pic, that O2 bung isn't factory.