Air Brake Governor Assembly This is a Merritor PN# RKN18532 Original applciation was a Military MRAP Vehicle but these are also used in civilian traucks. Save $$ here as these normally sell for about $75 ea. PN#1000539 NSN 2530-01-544-8834 You are getting this at a great price, plus….YOU GET This won’t last long at this price, so you better get it quick L2B1 10326