did you notice any difference in performance?

bill

On Saturday, June 1, 2002, at 08:32 , Loren Busch wrote:

> I just finished an experiment with the 4-prong Bosch plugs and K&N air
> filter on my '90 Westy.  On a 3,100+ mile trip, I changed to the 4-prong
> plugs and K&N filter half way in the trip. Gas milage remained EXACTLY
> the
> same on both legs.
>