I already done a stage 1 on my 09' ultra classic. SE A/C, Rinehart S/O's, V&H Fuel Pak. I had some trouble out of it, but all in all it runs better than stock. Now, Im eyeballin the SE Ventilator in black, D&D Fatcat 2 into 1 exhaust, and SE SEST tuner and havin it dynoed. Tell me your experiences with the Ventilator and 2 into 1 exhaust, any or D&D. Thanks.