So I just bought the 3" HKS downpipe, and the 3" HKS catback exhaust from a buddy of mine. My question is.... which, if any high flow cat will work with these components i have? Will they bolt up correctly? I just want to know cause I plan on installing the exhaust myself and I rather run a HFC than the stocker, or a test pipe (CA cops suck) Thanks!

 

In about a month we will have our bolt-on 100 cell race cat application ready. It will outflow any cat on the market.