[rodneym]

undy,
There's no link. I spoke to a guy at Holley customer service.
I didn't ask him about the Red. I always though it just pumps at 7 psi. The Black pumps at 14.
He said that if the PRV is stuck (open or closed, I can't remember), that you can get pressure creep. It can get stuck either from the ethanol in the fuel causing water corrosion, or from what they use to test them (if it sat on the shelf a while - I doubt that's it, I've got over 1k miles on the pump).