yup gives you timing correction which is really important, I would get a wideband as well. After my clutch thats my next mod, before things go boom. I wouldn't try and do any tuning without a vag-com though

 

allz i can say is holy fvckin **** man....they r deff the way to go...cant wait till i get some widebands and vags so i can get it tuned. prob have it done in a month...gotta meet up with jest in c-town to get some logs.