Universal Chevy Ford Water Pump Pulley 3 Shim Kit Set (1mm 2mm 3mm) Pop-Off plates are designed to

Pop-Off plates are designed to release the high pressure that builds up inside of the engine to prevent damaging or cracking your supercharger components

and have a maximum pressure of 7 psi with an externally accessible pressure relief valve

They are five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy

NOTE: You need Studs and Guide Plates to Run Roller Rockers

High-volume water pumps have a ribbed aluminum housing and a heavy duty ball/roller bearing assembly

Universal Chevy Ford Water Pump Pulley 3 Shim Kit Set (1mm 2mm 3mm) Pop-Off plates are designed toThese Speedmaster water pump pulley shim kits are designed to provide proper drive belt alignment with your water pump. They are installed between the water pump pulley and the drive flange. The Speedmaster water pump pulley shim kits contain one 1mm spacer, one 2mm spacer, and one 3mm spacer.