I'll answer for him....
*States
*400ish?
*yes/ and noise too!!
*yes, advise putting small hole in bottom, just to give cooler air MORE access to filter
*yes DIY
*coolant reservoir for radiator, is moved to other side by swiveling the bracket round.. no more than that
http://www.injen.com there is more stuff on there
NB you might notice in the picture that there is a brake booster on the wrong side.... damn americans....