+1 on the 8 rib and the tensiner....I havent done the * rib yet but I'm only at 6psi so my belt is not slipping....yet....but as soon as I go to 10...I'm doing it also.....as far as the tensioner goes.....this is a must....you'll find a bunch of posts about shreded belts and bented tensiners...thuprrr is a very good piece....it is the official whipple tensionr if I'm corect....BUT for the 400$ that it costs...there's way cheaper alternatives....they use the exact same spring from the stock one.....so you can just go and buy the steeda one which is the same thing but it's 120$....That's what I have....it's a stock tensiner with a welded 1/4" aluminum plate on to beef it up.....it aint going anywhere......it's really up to you....I woul'd save the extra 300$ and buy something else ....
BTW I'm still running the KB stock tune...I'll get it custome tuned at JDM as soon as I get my IC....god luck....and like nycmikie1 said......don't let anyone talk you out of it......KB is one of the best,easiest to instal,reliable,and THE CHEAPEST complete 10 spi kit you can get....you can order only by phone......I'll take the day off when you do that....their CS sucks major ass....the phone lines are allways busy....i think that they have like 2 lines only or something LOL
p.s. the background in my sig is an actual photo of my blower.....look up in the search i have a step by step write up with photos on instaling it.....GL bro