08 mazda3 questions
 

Now that ive finally figured out how to use the threads and posts, I have a few questions. Any help is appreciated. My car is a stock '08 5 door.
- I would like to add a CAI - anyone know which ones work well in this car (Mazdaspeed, Injen, etc)?
- I have seen talk of a group buy for Pulstar plugs on this site. Is that still going on? I want in!
- Ive heard of a potential vulnerability issue with the mazda3's door locks, and that a fix was supposed to be implemented, but the dealership is clueless about it. Anyone know if this was included on the 08 cars (service bulletin, factory mod)?
- Also has anyone done a driving test to see if there is any mileage difference with the DSC off vs. on?