Is it possible to customize an exhaust to make it quad?

.c2

Yes as long as your bumper is able to fit it. Any muffler shop should be able to chop off the tip and weld new ones on. I had this done with the exhaust on my old 93 civic, single tip. Bought a new tip for like $35, went to a muffler shop and they chopped it off and welded the new one on for $20, took them only like 10 minutes. Just make sure the inlet and outlet sizes of the tips are right
With the stock bumper you're definitely going to have to cut where the exhaust pokes out, but this works well with the Nismo rear and Zele I think?

Here's that youtube video someone was talking about a few posts up

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