I too have a Hayden M6 in my 07 Ultra. Worked great for 25K miles. When I was replacing my compensator with the SE Comp. i noticed the shoe on my M6 was worn. Called and Hayden offered the new springs and a new shoe. I was couldn't wait so I reinstalled the old OEM for a weekend trip. Bike ran fine a little more whine the the M6 had. I reinstalled the M6 when the new parts arrived.

Now I to get the BANG when I blip the throttle from idle. Other wise quiet and smooth. What is it about the new SE Comp that causes this problem? Is there a solution for this BANG problem?