Has anyone tried the plug in tuning boxes? I'm thinking of buying one of the dragon performance ones, which claims to take my 105JTD from 105 to 136 bhp, and about 200ft/lbs. This wouls mean a drop from 0-60 in about 11 to about 9 secs. I would greatly apprciate any experiences relayed to me. My sister has a Galaxy tdci 115 with one on, and it flies. It really does feel like it has increased to the predicted 143 odd BHP hers claimed to ahieve......

I've heard that fine tuning at the garage, specifically for your car, works better with fiat engines. But that's only what I've heard.