Also, if the primary pump slot in the road race unit isn't holding the special 255 we provide with it, it will loose its built in siphon that pulls fuel from underneath it. This feature might be overkill, but I like overkill. Should the primary pump in the road race unit be switched out for a different pump, I would definitely upgrade the pump in the stock sending unit.
This, in essence, would be the FI model. Basically any pump configuration, single or twin, in the road race unit that isn't the single walbro 255 with built in siphon we provide.
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