The Edelbrock 2650 does not have much belt wrap on the blower pulley. This kit allows you to run a down to a 2.625 blower pulley while drastically reducing belt slip, before anything less than a 3.25” pulley you started to see slipping in the upper RPM range. Intended to be used with a 3” or smaller blower pulley, this adjustable idler pulley will allow you to run up to a 3.25” pulley.
Recommended belt sizes:
3” Edelbrock and 3” Griptech - Gates #K060820
2.8” Griptech and 2.75” Edelbrock - Gates #K060815
NOTE: NOT EVERY CAR IS THE SAME SO BELT SELECTION MAY NOT BE THE SAME FOR EVERY CAR, FOR BEST RESULTS SET THE TENSIONER AT 40-50% DUTY CYCLE