I was on my GT jtd16v 150hp mapped heavily (kills original clutch) I mounted a xylem monomassa steel and reinforced clutch with spring drive paid the beauty of 1200euro almost a couple of years ago, unfortunately I had a bad experience with this clutch... I have done 5000 km, and starting from a standstill the car vibrated the whole...
...disassembled the clutch, explained the defect in the xylem have sent us another clutch with anti-shock reinforced, practically on the first engine was the 6 springs, while the latter 4 ghosts big ones... hoping to have resolved assemble the whole thing and vaii.... !!!! 2000km further and rivibrava all!
Moral of the story after so many attempts??? I did change the clutch to a company and now ? on for many miles without a problem and the car does not vibrate in the slightest....
I don't know if it is convenient or not to spend the whole of that amount, I end up between new clutch and change I got to spend 1500euro, not to mention the labor of the mechanic...