Anyone know how to remove the airbox...to replace filter with aftermarket one?

 

Chris,
Unplug MAF sensor, right side rear of airbox, open two wiring harness clamps, one left side rear, one right side rear, that hold harnesses in place. Remove or loosen hose clamps, 2 large, 1 small from black hose that runs from airbox to thottle body. (no bolt holding box to body on the 997, box is riding on a pin with a rubber bushing) the screws on the 997 airbox are accessed from under the box so the box must be removed from the car to change the filter, pull the box out of engine bay, note: 2 rubber bushings under the box go on pegs and into 2 holes under the box, make sure they are in the holes when you replace the airbox.
turn box upsidedown and loosen screws, split the box, replace the filter, it only goes in one way, sounds more complicated then it is.

good luck, PM me if you have a problem


Roy

 

Has anyone put a K&N on and noticed any difference?

 

I found the DIY for airbox removal on a 996 which is very similar, except there is a single bolt to remove, where in the 997 as you described is simply sitting in some rubber bushings. And by the way, I just received the K&N filter to replace the stock one. I was going to get the BMC filter, but it was not available at the time I ordered. I'll post any benefits.