I was trying decide between the Pro Flow Nitrous system and NOS fogger kits. Any feed back about either of these would be great.

I was also thinking about buying the pro-flow nitrous back fire valves that automatically relieve pressure through 1.25" diameter holes that screw to the side of your intake.

Also they mention something about down side solenoids, can anyone explain the benefits of this.

Any input would much be greatly appreciated.