Ok, so I got defected and i need to pass EPA. I have eg stock catback and the OEM cat at home. No d-series headers. Also have a hi-flow cat with Mugen Twinloop catback for ITR.

So I dont want to weld or use anything thats on my car atm.
Not sure what it is or what brand. It was a stainless steel pretty sure 2.5' with 100cpm cat



So I want to do is pass my EPA at the lowest cost without welding/destorying the Mugen or the exhaust i have on now.
Its an EG Hatch GLi with b18c7.

What can I do.
Ideas are very welcome.

-Chris.