Quote Originally Posted by Ricky21 View Post
So those will also run fine with a smaller pulley?
Well, if you are going to run a smaller pulley soon I would install AL605s. They will only minimally affect your MPGs, and should allow a mild pulley drop. Every engine is different, so you’re going to want to monitor your KR just as you would for any pulley drop. But man why sweat it, plugs are cheap and easy to change. Definitely keep your 104s, but also definitely change to 606/605s for time being.