Exhaust and Power Commander Update I installed the silencer this morning and it makes quite a difference. The installation was simple, requiring just two hex bolts. I'd estimate it's 3 to 4 decibels quieter but still sounds racier and better than the stock exhaust can. It's perfect.

As for the Power Commander, it's definitely smoothed things out but at the cost of a little gas. My first full tank with the Power Commander installed indicates my mileage decreased by about 10%. We'll see what happens over the long term.  ¶ 4:49 PM