Anyone heard of the CATCO cat(high flow supposingly)?

 

yes........ http://www.summitracing.com

 

is it any good?

 

I have one on my civic. It is pretty nice. Haven't had any complaints about it.

 

loud, quiet? any difference from stock.. sound/performance?

 

Pretty quiet. It is probably a bit louder than stock. I had a gutted cat beforehand so it was a huge difference in sound once I put the CATCO on. I don't know about performance but I didn't expect much of a gain anyway. I just wanted to tone down the sound of my exhaust.

 

is it 2.5"?

 

I got one that was 2.25 to match my header and exhaust.

 

do they have 2.5.. I am using it for turbo application