I'm sure it does what it claims. I doubt you'll feel any difference though. You also reduce the life of the belt marginally and if you go to a dealer they'll know you did this mod if they try and fit the OEM belt. For that reason alone I would opt out.
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'08 Carrera S 6MT Guards Red/Black ext leather, Carbon fiber pkg, sport exh, sport chrono +, PASM, Nav, Bose, 19" forged turbos, red tranny tunnel
'07 MV Agusta F4 1000 R 1+1, Corse Red/Silver, RG3 race pipes and factory race ECU
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