umm that converter u posted, the catco from summit is not a hi-flow converter. its a stock replacement.

 

i know this cuz i bought the exact same one but from a different site hoping i could replace the catco cat w/ a magnaflow but the magnaflow is like twice as long as it. i ended up needing rob at strictly performance to make me a custom mandrel bent pipe using that flange from the catco.

 

I know, I think my cat's are slightly cloged because my engine blew and alot of burnt oil was running through my exhaust system. Plus my car has 90,000 miles and I think it would be a good Idea to change them anyways