Finally going to crank the 2650 a tiny bit. Sam at Amp said order a 1/2" smaller pulley. I have a 108mm and a 96mm is available from Magnuson. So that and a custom tune and trans tune. (Lingenfelter tune hasn't been bad at all.) What belt size guesstimate? It's 2020 6.2/10 spd Silverado, Lingenfelter 2650 kit, AWE 3" duals. Currently Micro V AT 25-060874. Would a belt company know? Thanks guys.

 

You’re just gonna have to buy a few different sizes and see what works brother. Gonna need a gates green belt to get good life out of it.

 

if SleeperGMC is still on here he might be able to shed some light on belt sizes. He is or was running a 2650.

 

When I was trying to figure mine out, I used a belt 1/4” smaller/shorter, with a half inch smaller pulley.
I have had great luck with the gates rpm supercharger belts.
I started with a green belt, but threw it several
times. Went to the rpm supercharger belt and no issues for 4 years and 18,000 miles.