I have a 2009 Ultra Classic, it has a stage 1 A/C, Rinehart 3 1/2" S/O's, a V&H Fuelpak. It runs good, but the torque flattens out at interstate speed, its jumpy at low speeds like in towns. Should I get a SEST and have it dyno'd? It seems like it doesn't pull quite like it did stock at interstate speeds. Also gonna add, I checked all the settings on the fuel pak last nite, all is correct.