[Taebeck]

I have the M4 pipes. I had to put the baffles back in because it was hurting my ears. Might be worth a shot for you but the fuel controller will be a must.

 

[Taebeck]

who makes the m4's not familiar with them. Have been looking at the Mortons

the M4s are made by .. well .. M4 lol Link is below

M4 Performance Exhaust Systems

They are a world class sport bike race exhaust company. This is their first try at cruiser pipes. The pipes sound great and give a very noticable power boost through the middle of the band.