Torker LPX = Low Profile eXtended (long) frame that replaced the Torker MX
With the success of the Low Profile frame in 1978 and the Torker MX discontinued in 1979 Torker decided to eXtend the top tube by one inch to give the larger riders a frame to get rad on. The normal LP frames were 18 1/4" and the LPX is 19 1/4" long....
from JT's '81 off of BMX Museum
looks like its goodbye aero reflex