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...
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?