Boss Audio MCBK420B MC420B 600 Watt Motorcycle/ATV Sound System with Bluetooth Audio Streaming - Black drive-primary-drive They are designed for piston

They are designed for piston replacement

2001-2005 Harley Davidson FLHR Road King

they are fully tested in the virtual wind tunnel to guarantee improvements in the aerodynamic coefficient (Cx) and the aerodynamic protection to the rider

2007-2009 Suzuki M109RZ Boulevard Limited

2016-2023 KTM 450 XC-F

Boss Audio MCBK420B MC420B 600 Watt Motorcycle/ATV Sound System with Bluetooth Audio Streaming - Black drive-primary-drive They are designed for pistonBluetooth audio streaming stream and control your favorite music apps. Available in chrome and black. Weatherproof. 3in. chrome speakers. 2 channel compact amplifier. 3. 5mm aux input. Volume control. Adjustable brackets.