- Megaphone system with patented SuperTrapp tunable disc technology
- Adjust sound levels and powerband by adding or removing 4" external discs
- Includes 12 four-inch discs, rebuildable core and packing
- For Shovelhead and Ironhead XL
- Made in the U.S.A.
- For 66-84 FX/ FL/ FLH Models
NOTE: 71-72 models require late 72 or later offset kick-start arms such as PART #DS-241003 or OEM #33057-72.