ham_sammich wrote That's the obvious. My questions were intended to extract more specific information about the kit, like what pumps does this kit contain, flow rates, max pressures, brands, etc etc etc.
OK, then I'll answer your original questions which are different than the ones above:
How is this superior to the stock fuel system?
Over certain whp levels, the stock fuel system loses pressure and will eventually cause misfires, dangerously lean conditions, and eventually causes blown motors. The fact that this new fuel system doesn't lose fuel pressure on any known S65 setups, makes it superior IMO.
How does this improve performance?
It doesn't improve performance of the car, but does improve performance of the stock fuel system as described above.
What sparked the idea to create this fuel system?
Drew was running high whp, was experience fuel cutouts which were traced to losing fuel pressure under high engine output.
4-6 bar is stock pressure. not a huge chunk of specific info here
How does the kit hold up over time? is it reliable? etc.
We've run it on three or four cars. No issues. I can think of four shops that all use this fuel system, ours included.
come on bro, don't insult my intelligence
Hmmm. Well, those weren't the questions you asked. For any deeper answers, I suggest you contact Drew, he's the guy who designed the fuel system. He's mentioned in the first post.