Just a note for anyone considering an HD IDS part# 40287-07 @ $305.00. I highly recommend it for your 07 Touring ride. Not only does it dampen mechanical clunk and noise for a smoother ride, someone told me rear tire wear would increase by 20%. I had it installed at my first rear tire change @ 5200 miles. I now have over 14,000 miles and probably will make it 'til spring. I do ride two-up most of the time though and am not sure if that has any thing to do with it. It's standard on the '08 and I don't know(doubt it) if it will fit prior to '07 touring models. Ride safe.