SPA, if you like digital
I've been using the SPA gauge for about 10 months now, great product. My personal opinion is that the electric sender with the SPA is stronger than the others. While mine spent about 4 months of it's life pre-filter, the rest have all been post filter, at the bottom of the fuel filter canister outlet, connected right to the pressure port, no snubber. Still working like a champ for me.
Scott W.