With performance I decided to get a bigger turbo and chip it thru APR. I also have the 3" APR turbo inlet pipe (noticeable difference), 3" APR downpipe, and 3" MaxPSI racing cat back exhaust. I'm thinking of getting the LSD but I don't race around all the time and don't think it would be worth the $$. Once you start increasing your power, you always want more but I'm trying to get the most out of my K04 without having to do some major engine mods. TIMING BELT MISHAP!!! 2006 For the v-dubbers that have done some engine mods and are planning to change out their timing belts when the book says (anywhere from 80-100k) DON'T LISTEN TO THAT Shyte!! Based off personal experience with my timing belt breaking at 79k and having to spend over $2000 to replace all the valves that were bent (and most of them were) I would suggest changing out your timing belt every 65-70k. The VW specialty shop that repaired my jetta suggested no more than 65k.My oil is changed every 3000 miles with Mobil 1 fully synthethic oil. I use 91 octane fuel (since Colo. Spgs. doesn't have a better grade, of course) only and have been since I bought my car in Sept '04. Love and treasure your car and it will run forever. Keeping your vehicle up to tune will save you tons of work down the road, especially if you plan to do any type of engine mods.If you like my ride, please CLICK HERE.I'm not sponsored. It's all me...and my boyfriend's help. Hope you like my ride and please rate it. Thanks for stopping by!