CORRECTION: Venom Nitrous can be used with a returnless system...........Additional fuel is added via injector pulse.
Trevor, all good info. However, the Venom sytem is more flexible, and more importantly in my opinion, safer than the ZEX kit. The best advise you gave is for those interested to do ALL of your homework.
Also, the Linear mode of the Venom System is progressive.
NOS kit $550
NOS Progressive COntroller $550
Jacobs Nitrous Mastermind $250
Prices approximate retail, and you're still not up to the flexibility of the $1399 Venom System
Mark
Now running 49% or 80HP

Track and Dyno soon........