Jim Weir wrote in message . ..
It goes on the pushrod tube. Its main function is to add 0.05 to the weight of
the aircraft without having any other use other than to prove that you spent a
dollar a horsepower to buy it..

Pushrod tube? As in the throttle linkage or something? I have no
idea what a "normal" carb looks like; we have one of those Ellison
TBI's. Sorry to be kind of dense here, but some of the things the FAA
restricts (as far as equipment and certification) seem absolutely
ridiculous.