I started with a stock 09 FLHX then I installed V&H MO I drove it about 2000 mi then I installed an SE air filter and PVC pre loaded map from fuel moto it ran a lot better more throttle response quicker off the line I can use Th gear now but a little popping out the exhaust on the decel a little surging at 75 mph on the hi way still a lot better then stock put another 1500 mi on it now I installed the auto tune I don't know if it is just me but the thing runs smoother and it does not miss a beat I have not been on the hi way yet but I think I am going to love it why cant it come from the factory like this ?