Tensioner & Idler Pulleys
Greatly increases belt wrap when switching to a smaller pulley.
If you are going to run a smaller supercharger pulley sometimes it makes more sense to buy a larger tensioner pulley. The tensioner pulley costs less than a new belt and is very easy to change using a 15mm wrench.
Our 3.5" tensioner pulley (stock is 3") will allow you to reuse your stock belt with a 3.4" supercharger pulley on the 3800 set up. It gives you more wrap on the SC pulley helping to prevent belt slippage.