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Does anyone here have any recent experience with these units? I installed one on my ride and it really made it sound different. It has a rattle to it now like the valves are loose and almost sounds like it's tapping in the rear of the block. The truck only has 29k and has always purred like a kitten. Anyone familiar with this? I'm fairly new to Cummins and may be overreacting because the truck runs fine and pulls strong it's just noisier than I'm used to. Should I take it off or do other modules have the same effect?