I just installed the FP3 along with stage 1 air cleaner, Running reinhart slipons, Next project will be Fullsac header. Harley sure did try and talk me out of using the FP3 as they didn't make any money from it. So far the bike run just great. Feels like more roll on power, might be just me. But Iam a happy guy. lVance and Hines are great people to deal with as is Steve at Fullsac. Just wanted the bike to run cooler, not wanting to make it fly, to old for that. I enjoy riding secondary roads and some slower riding at times. Then back on the interstate to hall butt home.