Fits 4-71 thru 18-71 roots and screw superchargers. Outside diameter of blower pulley spacer is 3.425". Spacer has one elongated bolt hole to be used with older blower snouts or crank hubs that use one offset bolt hole.
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.
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