KRC 20008 000 3.5" V-Belt Pulley (Aluminum Pump Only) KRC 20011 000 6.0" V-Belt Pulley, GM Offset (Aluminum Pump Only) KRC 20012 000 8.0" V-Belt Pulley (Aluminum Pump Only) KRC 20015 000 4.2" Serpentine Pulley, 6-Rib (Aluminum Pump Only) KRC 20015 300 4.2" Serpentine Pulley, 3-Rib (Aluminum Pump Only) KRC 20016 000 4.2" Serpentine Pulley, LS Offset (Aluminum Pump Only) KRC 20017 600 6.0" Serpentine Pulley, 6-Rib (Aluminum Pump Only) KRC 20019 000 6.5" Serpentine Pulley, LS Offset (Aluminum Pump Only) KRC 42315 000 40-Tooth HTD Pump Pulley (Aluminum Pump) KRC 42315 005 40-Tooth HTD Pump Pulley (Focus Aluminum Pump) KRC 42317 000 Rock Guard for KRC 40-Tooth HTD Pulleys