I have a used k40 calibre system with a front diffuser . it has bluetooth front and rear detectors and u can can use the diffuser for the front or rear . I have all parts ready for install. go to to K40.COM if want to know more about the kit. ALL I CAN SAY ITS THE BEST MONEY CAN BUY. BRAND NEW WITH DIFFUSER THIS KIT COSTS AROUND $1300 I AM SELLING FOR $600 OBO please email me at rsteg98@yahoo.com for questions or offers . this kit is all unseen unseen as you mount the detectors behind your bumpers and you can mount a diffuser to your liscence bracket if need be . the module goes under your dash and you can mount the 2 leds anywhere in your cabin and control it with a bluetooth remote. ASfor the detectors all they need is a power and ground so you dont need to run wires all over your car its fairLy easy to install its just time consuming .