ok KYMP5, My dad actually has a FedEx account and I believe he can ship to canada from there. So I will double check that and get back to you so that hopefully the canada guys wont get left out.
to answer some questions, of course you can go back to stock, I will have to do that every 2 yrs to pass visual inspection at the emissions. It is a bolt on part meaning it can be unbolted and taken off.
What other mods are necessary, honestly I would wait for their catback system, which from the axle back I have should be awesome, to use an actuall O2 sensor, so then for now I would use the MIL eliminator made by Apex motorsports here in tempe.
If the header GB gets going I can talk to ben at Apex and see if he will let me buy like 10-15 MIL fixes if I stop buy and then ship to everyone who wants one to try for a few saved dollars there. but at 22 to start it wont matter much.
The reason I like this header the most so far is you retain you 2nd cat, so you have at least some emissions control going on, a little backpressure left and easier to install and uninstall when emissions rolls around.
you can put me down on the GB list for this, or let me know if you want me to start a thread to gauge interest in the GB forum. guesses for gains...hm racing mazda gained somtething like 10-12, with retaining the 2nd cat(which is far less restrictive than the first) I think this one should be able to make 8-10 depending on what else is done to the car. that guess could be so far off though.