Aeromotive's stackable regulators are ideal for carbureted nitrous engines. These regulators allow you to stack them together to control multiple pressures with a single fuel pump. This stackable regulator is a clean, light-weight solution that's ideal for nitrous engine combinations where unique pressures are desired. Tech Specifics -Part Number: 13217 -Adjustable from 5-12 PSI -ORB-10 inet and outlet flow-through ports -(2) ORB-06 outlet ports -Includes (2) O-rings and (2) 12-point cap screws -Serviceable in the field without removing from car