Well their intake was such a "great" design, not only did it make the car run LEAN but it through CELs and was RECALLED. They recently released it so now it has the same maf housing as the cp-e and cobb sri along with an air straightener. I don't know how anyone can argue the designs of those two aftermarket intakes.
And they issued a recall on the intakes, right? Because it was their fault, warranty claims and dealer work resulting from the CAI are covered by Mazda.
They can do that because they brand and market the part, thus it's up to them to satisfy customers. If it's not their part... it isn't... if you blow your engine through running lean with
someone else's intake, are they obliged to cover?
Aside from that obvious gaffe, most modification parts sold by dealerships through tuning partnerships, Nismo, Mazdaspeed, MOPAR, SVT, whatever, are relatively mild and aren't quite as powerful as similar aftermarket parts, in order to keep the warranty intact. (TRD supercharger gives you only an extra 40 hp... pretty pathetic on such a big motor, but necessary to keep the drivetrain warranty intact) When the parts
do give you a lot of power, there are limitations and warranty exclusions placed with the package... for example the Saleen Focus was marketed by Ford, but using the nitrous package automatically voided your road warranty. (niiiiiiiice) Got a 300hp MOPAR kit for your Neon SRT4? Good luck...
Listen, Mazda isn't the greatest out there when it comes to aftersales service, but they are far from the worst. Nobody is going to give you a free ride, or even a
fair deal once you start tearing into the car and modifying. That's something many of us take for granted, already. Along with the reality of "Pay to Play" Racing is tough on cars. You can get valve clatter from just a minute or two on the autocross... inducing enough oil starvation to get the top end of your motor pretty hot. Now do that a few dozen times...
I've replaced motor mounts, three clutches, a ton of bushings, my entire suspension, a third gear, two sets of brakes and have had my cams adjusted all because of wear-and-tear through track use. I could have had the cam-work done at the dealership because I'd just had my timing belt replaced before the cam jumped a tooth (and caused unwanted overheating and cavitation), but as the problem first occured on the racetrack, I decided to just work on it myself.
At the OP... go with Subaru or Mitsubishi, and the story's the same... if you want to enjoy your car the way it's best enjoyed, on the track, you won't get more than ten yards out without a manufacturer rep taking your picture and pinning it to the dealership wall. I suggest, if you don't want to deal with this crap, that you just get something else, and scout around for a secondhand WRX as a track toy.