Speedo set at 140, Throttle Position at 2 or 3, disabled DFM (mine didn't come with Auto-Stop), and the whole reason for the Pulsar LT was the sounds that emitted "choppy" helicopter noise. During the 1st week of purchase on the TB with the 6.2L motor, I've elected to apply aFe Apollo GT Muffler Delete + $40 welding. Prior to this, I'd been using the L mode on 9 and noticed better-sounding exhaust notes (but this gets old every time I turn on the truck). My suggestion is to purchase the Pulsar LT if you are planning exhaust modifications, lift, or tire size changes in the future.