Your EGR valve might need cleaned. Here's a how-to http://www.mazdas247.com/forum/showthread.php?t=94788. You can also replace it with the Canadian version which is better.
justinlansdale or something like that? I don't think you have to do anything to make 16" wheels fit. Right now I'm running my winter setup which is 16" and I didn't have to do anything to fit them on. Your speedo will be off just a bit though.
edit: zuku beat me to it, lol
Those are nice looking. You could always make your own http://www.mazdas247.com/forum/showthread.php?t=123747369, they don't look as nice, but nobody see's them. They're cheap too.
Do you have the MSP rear brake calipers? I really only need the left caliper but if you have both I might take them. And do you have the e-brake cables? If you have them, how much shipped to 16331?
Endlinks would be my first guess. I have the clunk fix bracket and after about a year the clunk showed up again. I replaced the endlinks and that solved the problem.
I'm having issues with my back brakes. On the right side, my e-brake doesn't work at all. I tried adjusting it and nothing changed. On the left side, my caliper is seizing up. It's not seized up the whole way, but it barely spins. What should I do about the caliper? Is there a place where I can...
It might just need adjusted. Pull the cover off around the handle and there's a 10mm(I think that's the size) nut down in there that is the adjustment.
Maybe they're not 5mm them. not yellow, I bought them off of you, were they 5mm or not?
edit: nvm, I just checked and they're 5/16" (8mm). So should 8mm spacers fit the stock setup? If so, I have a problem.