Those of you running a JDM 4-1, what are you using to replace the catalyic converter that's on there stock? I'm looking to get one soon and am thinking of getting a test pipe. However I would like to know what some of you guys are running and where would be a good place to get one online. I'm more leaning towards a test pipe.

 

kteller have good deal and option for ur o2 bung

 

got a 2.5" cat off ebay for ~$50 shipped. look there. wasn't a carsound or anything, but 2.5" is pretty big after looking at the stock junk.

 

I ordered my 2.5" Carsound from IPS and it fit perfectly.