WHIPPLE: 3.750" 8-Rib Pulley / HEMI 84330249 most upgrade-able and highest quality

most upgrade-able and highest quality system available for the 2015-2017 S550 Mustang

If you drag race your Fourth Gen

Recommended for boost range 9 - 15 psi on LS motor

SKU 34104280 Year Range 2012+ Weight 90 lbs

The 10 rib conversion requires the ATI lower balancer PN #918856 sold here:

WHIPPLE: 3.750" 8-Rib Pulley / HEMI 84330249 most upgrade-able and highest quality3. 750" 8 Rib Pulley Black Every Whipple Supercharger pulley is made of 6061 T6 billet aluminum and anodized for wear and environmental protection. Each pulley is engraved with the running diameter size and state of the art light weight pockets to lower reciprocating mass as well as a guard feature to help unwanted belt wandering during hard running. Standard finish is hard coated black anodized. Dimension of each supercharger pulley is based off of