The "hp" stands for the high pressure version. It's doubtful that a normally
asperated Miata needs this option. On the other hand, the option seems to
help with turbo'd versions using the original 99 non return fuel system.

After all, ~108rhp stock vs ~220rhp boosted (rear wheel HP) means that a
little more fuel is needed.

"Leon van Dommelen" > wrote in message
...
> (BRUCE HASKIN) wrote:
>
> >Grant,
> >It's a "fuel pump" that they are talking about, not a water pump !
>
> One can see why the US is known as the gas-guzzling nation of the world.
>
> Leon
> --
> Leon van Dommelen Bess, the Miata Bozo, the Miata
> http://www.dommelen.net/miata
> The only thing better than a white Miata is two white Miatas