yes. id would say to try a 1 inch bigger belt. 2 inches is required for both

 

yes. id would say to try a 1 inch bigger belt.

that I was thinking because in the MWR page it says for both pulleys by one 2 inch longer so I was thinking then 1 inch longer thanks for your response

 

came from installing it its oficially 1 inch longer belt that is needed. Diferences it revs a little bit quicker the voltage now fluctuates more (yes I have a cobra radar that has a built in voltimeter) and i remember that when running the lowest the voltage will got was 13.0 now when braking it goes down 12.8 or 12.6 but running y fluctuates betwen 13.8 and 13.4 like normally did without the alt pulley

 

??????
Larger pulley = longer belt = slower spinning alternator.
Sounds like somebody's confused!