are cat. converts universal ??

im trying to get some info on how much my exaust system will cost and im wondering if when im looking for a catalatic converter if i have to look for a brand to match the y - pipe and/or the rest of the exhaust or just match up flange sizes ??? and is a high flow cat really neccassary for a car that makes less than 300 hp ??

Highflow cats are always helpful, and no universal converters are not what your car uses. Look up catco converters, they sell bolt in high flow converters that will be easy to install.

so catco is good then ??? ebay has some for like 34$$ shoud these be ok ? or is there a catch prolly??

i got mine off ebay. it came with my flowmaster exhaust system. i have yet to have any complaints, however the IROC has not been a daily driver sense i put it on. so i dont know about their performance under daily driver conditons.