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Message: [QUOTE="Derek@Vision Diesel, post: 334800, member: 344"] Have a truck with large enough injectors that the stock selector valve and fuel lines were not going to cut it. The original idea was to use 2 sumps. The rear sump would gravity feed to a T on the front sump, with hopes to keep the 2 tanks tied together as one large one. Then we would return all fuel to the rear tank (because it is higher). Purchased 2 sumps and all the gear and went to install, a sump will not work on the rear OBS tank.... or at least not the sumps we got. The sumps we have are 5" diameter on the out most O-ring, the largest we can have is 4" on the out most o-ring to use it on the rear tank. [B]Question 1:[/B] Has anyone found a sump that will work or does someone sell one no larger than 4" diameter on the out most o-ring? [B]Question 2: [/B]Whats another method people are using on the OBS trucks while hopefully keeping the stock amount of fuel on board (one large tank? 2 pick up tubes with a manual selector valve before the first filter?) Thanks!:fordoval: [/QUOTE]

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