Please excuse my ignorance. But which one of the Cattman Y-Pipes should I be ordering since I live in Canada? I see two listed on their site:

1. Maxima/I30; CA/NLEV emissions specification*

or

2. Maxima/I30; Federal emissions specification*


What is the difference between these and how do I know which one I need?

Thanks!

 

Go here

http://www.cattman.com/y-pipes.shtml#pipes

There is a picture at the very bottom that tells you how to identify which spec exhaust you have. I believe there is also a sticker in the engine bay that will tell you the same info. Hope this helps!