This type of pulley allows a racer to gain .750" from the blower snout mounting surface without using a blower pulley spacer. Fits 4-71 thru 18-71 roots or screw superchargers.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.