any sugestion for a Auto? i like that T1R B-Max Carbon Intake but I dont know if that will work on a Auto and I dont real want a CAI

 

Cold air is higher in density. The factory air box is utilizing the cooler air from outside the engine bay anyway. If you wish to keep your warranty I suggest a K&N drop in filter like I am looking into.

I am considering SCCA as well and from what I've read so far, a cold air intake (the pipe with cone on the end) is not legal for the H stock class.

 

That's right, no mods to the intake plumbing are allowed in SCCA autocross stock classes. I'm prepping my Fit for autocross season next year, too, so I'll be using a drop-in filter, probably a K&N.

The Fit's OEM intake setup actually doesn't look too bad, considering that it's got a nozzle to draw cool air from just below the bumper. But I'm also reading between the lines on the rules, so I plan to insulate the stock airbox to try to keep it cooler, using a foil covered stick-on insulation blanket on the outside. I suspect it picks up a lot of heat, being right behind the radiator.

 

Where did you find info on the HKS air filter? Would that be reusable?

 

I wouldn't worry about making the air colder, the two resonators are robbing tons of power.

 

Is the Mugen drop-in reusable, because it doesn't say on jhp-usa.com?