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Update: The Detroit Speed solids add a bit of drivetrain noise - not much though. Had a good alignment done to the popular 5th gen drag specs. Very happy. I really like the 3.73 gear in the ZL1 diff. Puts the engine in a better position for around town driving. My exh system has some drone but the 3.73's have moved the rpms in 3-5 gear that I get much less drone around town.
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