RD Sport front sway bar
Just to close the loop, the tapping was from slack in the adjustable end links. I cranked them down 5 full turns on each side giving it the slightest amount of pre-load and the tapping noise is gone. The only sound I hear is a slightly different thump over big bumps than with the OEM front bar, I'm guessing that is a combination of the bushings and the hollow RDS bar.
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Ian 2009 e90 MT
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