1. Mine did it too and I don't know why. It's been fine for over a year though, so...
2. definitely a good idea opening out the stock filter with a better filter and more holes is definitely better than a pod filter because you're still getting cold air with your stock box.
3. I have no idea sorry
4. Chips are usually not really worth the amount you have to spend on them, unless you're chipping your car for better benefits from other mods. Chips won't give too much gain (I think about 5-10kw or so? someone correct me) if you are running a stock engine; if you have a modified engine, for example one where you've opened out the intake, intake manifold, exhaust and cams, then the chip will be of better benefit. Modding the VR is a lot of money and usually not worth the effort because you could bolt on a supercharger and be done with it for similar money.
Hope that helps .
Bookmarks