So I had my first weekend with then on. It sucked! I lost ~ 3-4 mph, and out of the hole it is a pig. I even took the turbulators out. Anybody else have any results. I'm thinking of taking them off. :frown:
Nothing is free. Reducing a 4" opening down to 2.5 or so, is gonna knock off some power. Noise and power go hand in hand. Just run them when you have to, and take them off when you don't. I have them new in the box, but have not put them on yet. Haven't had to.