I bought headers and an exhaust system for my fit. This is the exhaust kit I bought and currently have on my car, Invidia N1 Catback Exhaust Honda Fit 2006-2008 2007 HS06HF1GTP .

After spending that much money I went with these headers,
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And I don't regret a thing! (The one album I have shows these installed on my fit.) However, my exhaust kit didn't come with a catalytic converter. I still have the stock one on there. The two pictures below will show the top of the pipe and the converter underneath the car, one end hooked to the new headers and the other hooked to the new exhaust.






I've been looking around for high flow catalytic converters, but I would really like to avoid the welding and bending if at all possible. I found a magna flow one on auto zone, but I would like to see what you guys have in mind for me. I am new to fixing up my fit and I'm ready to take it further.

 

Unless your state does actual exhaust sniff emissions testing you'd be better off getting a test pipe and getting an O2 simulator. There aren't any bolt on "high flow" catalytic convertors for the GD chassis Fit and if you do want a "high flow" cat, you'd have to find either a factory cat/another test pipe, cut the pipe and weld in the "high flow" cat OR find the proper sized flanges and correct sized exhaust tubing and have it welded to fit your application.