Just like the title says. I have a brand-new RR 2.5" pulley for a whipple s/c. Never used or mounted. Sold the car. $85 shipped. Please text cause I don't get on here much. 6238109698
I've never used it. Its 100% brand new. But it does have the no slip rings to prevent slip. I'm pretty sure you'd have no problems. I ran a 2.75 with zero issues with. 100mm idler