Just got done installing V&H twin slash oval slip-ons on my 2012 SG. Intake AC is still the standard OEM (non-stage 1). Noticeably deeper & richer "potado-potado-potado" sound at idle, crack the throttle and a nice Harley bark resonates, and some welcomed gurgling upon deceleration. All in all very satisfied with the new exhaust notes. No remapping or tuner needed here.