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I recently upgraded my Cummins 5.9 turbo from 62/65/13 to 64/71/14 to improve passing power. Passing power is now phenomenal, however, after hard acceleration, if I let off the throttle quickly, I hear an intermittent noise for a second or two that sounds like it's coming from the exhaust...

I'm a laboratory scientist with what is probably the best 2001 Dodge diesel ever made. It's been mine for about 13 years, and has been nearly trouble free, except for an overdrive bearing. I've been gradually adding go fast parts here and there, and now it really does go fast! Drake Swett...