I had a dodge exhaust brake orderd , its never came in , & thay raised the price to over $1200. 00 . My dealer still dont have one ,He is talking like I will get my $500. 00 down payment back . So I am looking at other manufactures . Is it true the vaccum pump that comes with dodge exhaust brake is like the one on the power stroke that comes a part tears up a lot ? Would the exhaust brake that comes with own air compressor that acuates the exhaust flapper be more dependable ? I wander why dodge used a lite duty belt driven vaccum pump , instead of a gear driven vaccum pump , like in the past ? Are some exhaust brakes less restrictive as for as the exhaust flow ? . Appreciate all the help I can get, THANKS.