Ok I've seen catalytic converters on ebay but they don't list the inlet/outlet size of them. Is there a website somewhere anyone knows that may carry them with a 2.5" inlet/outlet?
Also I have a 95 GS with headers and a AEM V2 intake and am adding a 2.5" exhaust system. Later on in the future (more then a year probably) I intend to put on a HRC turbo kit. I would be happy running 12s or possibly even high 11s, so would I be able to stay with my 2.5" exhaust after adding the turbo kit based on these goals? thanks,
LA

11's? WHOA WHOA i think a cat converter is the least of your worries. not sure just add a pipe one that is like 2 inches then it changes to 2.5 or whatever you know what i mean you can buy it at auto zone it is short it can change the size then just weld it and put whatever size cat you want.

this girl pam underwood from south jersey ran 11.4's with full 2.5 exhaust and she used b16g and nos too(i hear)....so either you should go full and you will be safe....or try your original set up and if it knocks... lower your boost til you can afford to make changes to the exhaust...make sure you tune it well with your fuel and start off with low boost,add slowly,have fun

checked a few sites such as dsmparts/extremepsi/slowboyracing and this is the only site out of them that had 2.5 cat...sbr had 3in...and thats all for them...there are plenty more out there but here's one: http://machv.com/busrachigcat.html