Welcome, and +1 HEADERS ARE REQUIRED FOR 3.4" pulley or else u will have a KR nightmare and possibly jack up your engine, also if u end up getting headers, a tuned pcm will help a LOT, u can get them from 3800Performance.com, ZZP.com, Intense, Overkill (these seem to be the most popular) unless u got HP Tuners of course, I have the DHP one from 3800performence.com and love it, I have heard stories of ZZP PCMs blowing up people's cars and then there's the overkill vs intense "fanboy battle" on the forums lol