The EX is for California vehicles and has sections that are not adjustable. As far as the 809-311, it will work on 2002-2006 VRSC and has been covered in this forum several times through the years. The reason it shows 02-03 is that for 04 Dynojet introduced the USB models. Where the R was serial port, and computer were eliminating the serial ports and using usb portsI was gonna buy it from you Tampa but it looks like it is for 02-03 models and I have an 04. Power Commander site says for 04 it is part # 809-511EX. Maybe I should call them?