i have a 95 gsr. i want to get a hi flow cat. im thinking about getting a carsound cat. i have a header with a 2 inch collector. will a 2'5 inch cat bolt on? is a carsound cat better than a integra type r cat?

 

If your header is only 2" it wont work with the 2.5" cat. In my opinion, it seems like you want to get more airflow, why not get a 2.5" header then get that cat. For even better airflow think about going with a full 2.5" exhaust as well, something like T1R.