I think the ZEX fuel booster only increases the voltage or Amps going to your fuel pump, this is not worth the hassle.

the guys on MBworld have already lised all the part numbers for higher flowing OEM fuel pumps. no need to add extra electronic gyzmos to the car when a upgraded pump will do the trick when used in conjunction with an adjustble fuel regulator. they where more interested in the higher flowing pumps for custom SC projects. you won't be making enough power in stock form to require a bigger pump. unless you are adding nitrous and have to feed 8 injectors ?