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  1. VW Jetta / Bora MKIV 1998 Euro,1999.5 US -2005
    So, I've been considering taking 20-30 minutes out of my busy life to get a K&N High Flow Filter, and do the Swiss Cheese Mod. The only questions I have are: Does this mod affect the gas mileage? Is there a possible way to replace the AirBox itself? If so, how much would it cost? Thanks
  2. VW Jetta / Bora MKIV 1998 Euro,1999.5 US -2005
    So i was contemplating doing the swiss cheese airbox mod where you take a drill bit and drill a bunch of good sized holes into the bottom of your airbox, and i just wanted to ask the Jetta community before doing something potentially stupid. Thanks to all who respond to this message.
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