Can I run a 2.93 Billet flow non-slip with out an idler? Wanna keep stock look as possible. Also, custom or just buy a Hypertech max or Diablo tuner. Guy in town here says to go to Paul's High Performance in Jackson, MI. Is changing the pulley a night and day difference?

 

The tune is gonna be the night and day difference--a canned tune can give you almost 40-50 hp. Pulley will add around 20 or so on top of that.

But what do I know, I'm N/A. :/

 

Yea you can run it without a idler but why thou? You are just going to get belt slip without one. Also get a dyno tune. When changing the pulleys on these cars you need a dyno tune, not no sh*tty canned tune.