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I just installed 4 of these STI hangers. It took away almost 80% of the drone.
I have a kakimoto regu 06&r and it had a horrible drone starting from 2K rpm right up to 4+k. Now the drone is almost eliminated.
I noticed that the front pipe is bolted to the chassis unlike the rear muffler. Has anyone retrofitted a rubber hanger here as well?
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