For the racer that wants to keep there driving cockpit neat and tidy here is the answer for running a three speed air shifted transmissions air lines without having a tangeled mess. This rotary spool can be used in a pro mod, funny car or dragster and requires welding of the mounting tab that will have to be done by a qualified fabricator to insure that it is straight and no binding will occur when the racer turns the steering wheel. Rotary spool housing is made from heat treated cast alum. and the rotary spool valve is made from billet alum. with both parts being anodized for corrosion protection. All air line threads are 1/8" pipe and detailed installation instructions are included. Buyer must choose dragster or funny car/pro mod rotary spool from drop down menu. Please specify if it is for a 3 speed or a 4 speed.