Gear Vendors overdrive

I know people who have them and like them, and only a few who who don't. You go from a three speed to a six speed. I opted for a 200R4 that I love, but seriously considered the GearVendors. I now get better gearing and a better overdrive. Last year with the 904 I did 70 mph at 4000 rpm. Now I run 80 mph at 2800 rpm. I am very happy.