gary85...I was going to have one insalled at Quartzsite, pulled in for my appointment, but they didn't have one in stock.
I'm glad they didn't. I did a little more checking and found that they really only work at low RPM by blocking off the remaining hole in the PacBrake plate. If you're like me, I wanted more braking at 55-60 mph. The new unit only helps at low speeds. I have enough braking at low speeds. Hope this helps.
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab