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  1. VW Jetta / Bora MKIV 1998 Euro,1999.5 US -2005
    I know there is a forum already on the Swiss Cheese Mod for the MKIV Jetta Noob Guide, but the only problem is that the last post was in 2009 or 2010, so I just wanted to know if anyone has had this Mod for a while and if they've noticed any issues or if they've noticed a plus side to it? I did...
  2. 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
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