in line fuel reducer or a boondocker type box?
and why pull it both work well for most applications when set up correct.
but if boondocker box you just unplug from injectors they are just on top of throttle bodies.the stock plugs attached to wiring harness unplug from plug u pulled from throttle bodies attached to boondocker box.re plug them back in to injector.so now u just find where they got power for boondocker un plug done.
if a D&D style in line reducer they are just that more or less a old school carb jet in line to reduce flow unscrew and pull out jet put back together done.
if dial in dash with gauge still a inline system just unplug from fuel line coming out of tank and get a line splicer and 2 hose clamps or new fuel line from tank to throttle bodies but they are not fun to get out.
I say u want stock with this set up just turn presser up on knob all the way up.
now if U have a new high output fuel pump and any of above systems that is a diff can of worms and the guy was prob spraying that thing