Speaker/Amp Kit - Ultra Complete front and rear speaker kit with 300-watt, 4-channel amp, Amp features cast aluminum 3D design providing exceptional heat management and thermal performance in high heat climates, New shape fits seamlessly inside the fairing of FLH and FLTR models for easy install, Features proprietary R.E.M.I.T. circuitry which gives superb FM reception from a class D amp, plug-n-play and includes all required hardware to complete installation, System is easily expandable, No radio reflash is required