i think the s e air filter does help the performance , but i have not had a chance to take it in for a remap yet , i am hoping that will help even more , dont know if it is true or not , but i read that the download also raises the rev limiter to 6500 , any body know if that is a fact ?

 

On the twin cams, you really need to re-map if you do pipes and A/C. There is a lot more air moving through the system with those two changes, and the fuel/air mixture NEEDS to be adjusted. The bikes are lean from the factory, and pipes/A/C make it worse. I don't know if the Sportsters are the same, but I would assume so. If you spent the money already on pipes and A/C, just go ahead and get the PCIII (Fuelmotousa.comor Powercommander.com) and be done with it.