first he claims
"The PowerBox CR increases fuel pressure at the pump to maintain rail pressure"
then it claims this
"Will not harm your engine, does not increase injection pressure "
i dont see how you can increase rail pressure without affecting injector pressure
you are better off getting a chip that controls each injector individually by adjusting when and for how long it opens
there are stories out there about injectors failing due to eccesive pressure
and at $1400 each injector i wouldnt risk it