Harley Davidson Amplifier Mounting Brackets fit batwing bikes with stock radio for Rockford Fosgate PBR400X4D or PBR-300x2 or PBR-300x4 amps Fits all bikes with the batwing front fairing and the stock Harman Kardon Radio. (does NOT fit Aftermarket radios, 2005 or older stock radios, Road Glides and new 2014 + years) check my other item of brackets for these bikes. These brackets are made of strong light weight 1/8 inch (0.125)aluminum that is also good for heat distribution . The Rockford Fosgate PBR400X4D, pbr300x2, and pbr300x4 will mount directly to precut holes in the brackets. Comes with easy to follow full COLOR installation instructions. Will fit other model amps with a little modifications , wiring kits also avalible pt# B00L1PNX48