Billet Supercharger 4" Idler Pulley Universal [Suits 3" Wide Belt] So can features such as

So can features such as full ball-bearing construction

The plates are manufactured from aluminum and are anodized for protection

These gaskets meet or exceed OEM specs and are proven for racing applications as well

but they are all made from aerospace-grade aluminum

Billet Supercharger 4" Idler Pulley Universal [Suits 3" Wide Belt] So can features such asSpeedmaster's 4 inch polished idler pulley is built for supercharger systems, delivering consistent belt tension and reliable performance. Machined from durable 6061 billet aluminum and heat treated for long lasting strength, it features two sealed single row ball bearings to ensure smooth operation under high loads. The pulley can be flipped to adjust spacing by 1 inch, making belt alignment straight forward when blower snout lengths change with