ATI 3FRDR-001 ProCharger 8 Rib Pulley for factory balancer - 2011-2014 Mustang GT   (7.65" Diameter)

          Includes the following items:

BO05CI-028-1 6.00 5/16 - 18 X 1 3/4" HEX BOLT-FT-GR 5 EACH
BO12MI-120 1.00 M12 X 1.5 PITCH X 120 HEX GR 8.8 EACH
DC018A-015 1.00 8 RIB CRANK PULLEY-2011 MUSTANG GT EACH
DC033I-001 6.00 G8 ECCENTRIC CAM - CRANK PULLEY EACH
WA05I-12-1SS 6.00 5/16" STAINLESS STEEL FLAT WASHER EACH
WA12MI-24-1SS 1.00 M12 FLAT WASHER--SS EACH

When installing a new blower belt, don't go wide open throttle for the first hour as the belt needs to break in. Once the belt is broken in you will find that it has stretched, and it will then need to be tightened back down. Do this before going wide open throttle with a new belt, as once a belt slips it is more prone to slippage. Bob?