Is it worth it? Do you feel or see any difference? My MS6 is stock but I want a slight increase in my gas mileage (if there is any) and maybe a little more oomph in the butt dyno. I just want to know before I spend the money on it.
if you do it, i'd recommend gutting the stock airbox too. theres a how-to around here somewhere, but basically you just remove the bottom portion of the airbox to free up flow.
go do an ebay search for the part you need. I got 2 from Auto Parts Warehouse from their ebay store. One for my RX-8, my Mazda6 wagon and then one for my Mazdaspeed6. Never any problems at all. And they showed rather quickly.