installed kit today didnt change anything else(engine ice coolant)temp was around 80 (5 more than the last time i rode)and oil temp dropped from 190 to 175 can't tell on coolant temp but feels cooler to the touch on the radiator,the biggest difference is temp stability,before it would fluctuate noticably now its steady.as far as hp gain i don't know but it revs more freely (i can nail 4th gear on my test track where before i'd be slowing down in 3rd .even overshot my turn!) so is it worth it? the temp stability stands out the most,i would say it was a good investment. i don't know about the fan idea indy but this thing works!!!