Hello guys I’m new here.. I have a 99 cobra with a built motor,an it has a vortech supercharger on it with a 3.48 pulley. This weekend I will be installing a vortech inner cooler water to air cooler. I was told I need to down size on the pulley. I was thinking 331 to keep my 7pounds because that what it was making with the 3.48. I also have a power pipe. My question is belt size any any recommendations on length everything I’ve been reading says 108 but I have no clue any input would be great thank you..