Take a Side mount license plate holder for your custom engine! These Side mounts are the best Side mounts you can buy! We have been producing these Side mounts since 2010. Our Side mounts are made of 5mm thick steel and are hufterproof. These Side mounts can be mounted on your rear axle or shock absorber attachment. A Side mount license plate holder fits on a Harley Davidson but also on many other brands and types of engines. Naturally, a Side mount is very good on a bobber or chopper. Look here for a top quality Side Mount license plate holder!