I have been wanting to modify my exhuast to make it louder but not sound like crap. I figured bigger tips and high flow cats would do the trick. So what would a high flow cats do? Also how hard would it be to install on my own. Would it still throw the o2 sensor off? I have a si/do super 40 series exuast.

 

I Have high flow cats, no CEL... you just have to cut the old one off and weld the new one on.

 

Did it make it sound different? See here lately my 40's have sounded raspy. I want it to stay deep and be a little louder. Is it just a myth that bigger tips make the truck louder or is that true? I want mine for looks but if it does make it a little louder thats a plud too.

 

How does that Super 40 sound...cause i'm thinking about gettin a SIDO?

 

It sounds good. Its really deep and loud up untill overdrive then its like you don't have an exhaust period. I like it but like I said here lately when I get on it its kinda raspy.