Lightweight aluminumCNC MachinedHeavy duty shaft with 5/8 pilotSix-blade stamped steel anti-cavitation impellers for maximum water flow necessary on street applications100% leak testedWeiand's light weight, performance aluminum mechanical Action–Plus water pumps give a weight saving of 30 percent to 50 percent over stock cast–iron pumps. These pumps feature a premium quality bearing and seal that have twice the load capacity of stock pumps. Weiand's exclusive housing counter bore keeps the bearing form walking out. All pumps are designed with the necessary bracket bosses and water connections to fit popular street applications.