There are a couple of different types of valves that reduce the flow rate of the pump. One type is a fitting that screws in at the pump pressure port, they come in different flow rates, you decide which you need (hopefully they fit a Mopar pump). The other type valve plumbs into the pressure and return lines and is adjustable. It's a lot more work and expence to install, but it works with any brand and is infantly adjustable. I belive Summit and Speedway sell both.