i need a high flow cat to replace my test pipe to pass emissions and get this annoying ass raspyness out of the my exhaust. anyway i did a search on ebay and found a universal one for 60 bucks, which is cheap and all but i need to have a muffler shop make a bung for the o2, and thats fine too but does anyone know if it will come with the correct flanges or is it just better to buy a specialty one for my car (94 GSR) thanx in advance