This next spring I think I will install a NOS 50hp spool up kit. It is a single fogger set up. It only kicks in at a predetermined rpm with diff pills, like 3k or 3.2k rpms. It then can be turned off at another pill set rpm. Like around 4.2k, when the second turbo comes online. I think this is the safest way to go because you are not risking detonation as much as a top end kit. Like if you start spraying at 3k all the way to 7k. If you hit 19psi and spray a bigger shot....kaboom! This kit would spray when you tend to be running your richest anyway. I would install an AF ratio gauge too though. My local import speed shop quoted me $800 out the door installed. Any opinions on this set up, and price?