This is the one the
pros use. It comes complete with an NHRA / Prostar / IDBA legal
DOT approved air bottle which is mandatory at all NHRA race tracks.
It has the larger heavy duty switching valve / shift cylinder
assembly. It includes a handlebar pushbutton assembly with air
gauge and filler, plus all lines, fittings, etc. necessary for
installation. The optional 3" inch shift cylinder"
is necessary on some Harley Davidson race engine chassis combinations.
The junior air shifter
is aimed at the budget racer / street rider. It uses a non-DOT
air tank and has the smaller switching valve / shift cylinder
assembly. The DOT approved tank is available separately ( see
below ) for bracket racers wanting to use the junior shifter
on NHRA tracks.