As some of you re-call I was going to attempt to get in touch with Workhorse regarding the air dam in their gas coaches. I am very pleased to say that I recieved a call this evening from the District Service Manager from Workhorse.
He was very polite and understanding of my questions as to why the need for air dam - it is put there by design by Workhorse to keep the cool air up front and thus keeping the engine cooler by not letting the air escape the confines of the main cooling compartment.
He also informed me that they do not install the vent kit the first time the rear plugs fail. Normally this happens one time and after being replaced there usually isn't a second episode.
At this point I am satisfied that they are doing their best to take care of the problem.