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in my 2nd gen with the vp44 pump, there is a banjo fitting (kinda like brakes have to bleed) the legs a fuel press sensor plug into it on the supply line to my pump, and i reccommend edge man, in my opinion theyre the best
just my opinion yes, they all basically do the same thing, but edge seems to be the best out from alot of people, look around on this forum site, youll learn all about it...its a big topic. just go to www.edge.com