i would assume at most 2whp more or less.... in my opinion the cai on the dyno wont yeild u any gains.... may actually make u lose.... again its my opinion.... i havent seen the pulley make power but add to the the reponse a the car. the flywheel may be the only major factor.... if the clutch wasnt slipping on ur previous dyno pulls then a new clutch set up wont give anything either.... with all my rambling i hope u hit a good mark and im proved wrong