Is this right?....I'm not sure
 

Whent to a performance shop in town asking for HF Cats for my G35 sedan, he told me they are all universal and suggested Magnaflow :icon43: I have aftermarket headers and thought there was a specific style of HFC for the G :dunno: is this true can I use a universal or should I look for one specific to my car what are your thoughts?

There are plenty of HFC's made specifically for the Z/G: FI, Crawford, Berk, Stillen, etc. plus plenty of jdm choices as well: Power Enterprise, Mines, etc.