Quote Originally Posted by bluegtp91 View Post
Keep in mind 90's are rougher on the chain than 105's...after 40k on my XP setup I needed a new tensioner.

I say 105's.
Not true, the XP cam itself hurts timing chain DAMPNERS (its not a tensioner). The low idle thrashes around many things in the motor with constant starting and stopping. Note the belt tensioners when you are idling low, they get beat up fairly significantly fairly quickly.