We put one on our coach last spring. Paid around $750 for the part and installation at Camping World. With our GS membership we had a 10% discount on the part. There are different models of the Saf-T-Plus and the model needed for your coach may be more expensive. We have an F53 chassis and I think the model determination is based on what chassis you have. We found a lot of info online about them and researched comparing other brands. We did it for tire blow out safety and it helped with the bad push you feel from semi's. Also the constant adjustment needed to steer as it keeps it on center. Not as tiring to drive now.