Hi just wanted to share the following info. I just recently (last weekend) put a heavy breather SE air filter and Power Commander V unit mapped with this change. I noticed what i would call a big difference in power and performance. I easily reach 70MPH in third gear with plenty of throttle left and very surprised to find i am not shifting into 5th gear so quickly as the speed and rpms seem to be smooth in 4th at 50-60mph. I have V&H power duals and rinehart slip ons to still put on the bike. Question-does anyone know for a fact that i will gain more performance (plus i will dyno tune the bike at that point) particulary low end torq 2-4 gear and hopefully some more torq in 5th? would appreciate any feedback. I have to say that the fuel map i downloaded - i have not notice or heard backfire, knocking, pinging, or anything else. PCV seems to work fine.