Challenger SRT Hellcat
Well I'm sure as time goes by once these cats have been out for awhile longer there will be little add on's to do. Not sure if I would want the "swoosh" or not. We get that whine which is AMAZING!I would imagine the HC is fitted with a re-circulation valve that directs the excess air back to the intake when you let off the throttle. If it does have one I would also imagine that it could be swapped out for a blow off valve to instead vent to atmosphere giving you that swoosh you are looking for.