[metroschultz]

There is actual science behind the addition of air pumps, I am speaking from observation that in their fledgling use they really accomplished nothing.
The idea was
> Hot Exhaust +
> Unburned Hydrocarbons +
> Fresh air =
> less unburned hydrocarbons.
The earliest Catalytic converters were not capable of removing NOx.
NOx was reduced with EGR.

Catalytic Converters Require fresh air to work efficiently.
The new electric air pumps use Very Little current.
(My daughters Jetta has one and I can not even measure its draw with my antique amp meter)

I stand by my rec. Remove what you have and test your Emissions.
I believe you will be Happier with the results.
The early air pumps and related components were HEAVY.

THEN, If you need to add a cat. get one with a feed pipe and use an electric pump. (for the weight savings)