had my blue chip X pump for a year and a half i love it. the truck has better throttle response pulls strong all the way through the power band and gets 2mpg better. So what i spent a little more im happy and i have the piece of mind knowing that i have a good pump that will last.He was the only place i called that i got a real person on the phone. he was very help full and answered all my questions and had great knowledge of all of his products and the cummins engines.