caniggia

I installed one, It was bit tricky to fit walbro 400, but finally I did this.
1 hour for tune one and result is great for now.
I'm runing return style system, but with variable voltage, so for test on manual regulator I raised pressure lot and tuned like returnless. Even this high pressure makes regulator to leak, so in really returnless system this will be even better!.
Before it was 47% DC on stock pump, now with walbro 400 it's... 30% DC at about 8V.

Running this pump with returnless makes one silent like stock, if runinng return style at full voltage, loud.

Great alternative for dual GT500 pumps and another pumps like aeromotive 340 and their clones.