I like it, it does what I wanted and hidden under my cover.
Mines electric fuel pump with normally closed solenoid for double protection from fuel getting by when not on.
Ign power switch on fuel transfers, ign off switch off fuel does not flow.
2 lines one 3/8" fuel line supply the other 1/4" vent up and out the down.
If you've checked on Titan you should have found that gravity is not approved in most of the states, this is something you'll have to check on where you live.
A lot of people go with gravity but if they was ever in a accident and had fuel spillage, they would be fined big time no questions asked having gravity fed aux fuel tank.
More people have had fuel gauge issues with gravity, mostly IMO feeding to fast using larger lines, and a greater chance of over filling spilling on the ground, especially if they forget and leave the gravity filling.
You can overfill electric, if your really not paying any attention. I have 2 lights when ign is on and switch is on, pump is activated.
One LED is next to my switch the second one is next to my CTS2 small flashing LED light when transferring fuel.
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning