I just put on the 15% pulely and found that the belt Alta sent me appears way too big. I can't get anyone to answer there today on Saturday. My car is up on the jacks and I'd like to finish it today. The old belt is not any good and I was wondering if I buy a stock belt from a local parts store if that will work or if someone on here can tell me the right belt size for the pulley reduction, I can see if I can get that belt instead. The belt sent to me is a Napa Micro-V AT 25-060539. Thanks.

 

Napa 060535 is what you want for a 15% sc pulley reduction and stock crank pulley

 

thanks!