Hiya, My 96 RS-B has this electronically controlled (via the boot) muffler on it, theres a cable that pulls a plate shut at low revs, then opens at full throttle - my mechanic mate thinks its for noise or emmisions control in Japan. Has anyone else seen this on an RS? Ive currently vice gripped the cable open fulltime, the exhaust sounds better and the car seems to pick up better too. I think my pipe diameter is 3", whats the best muffler to get a decent rumble and good (legal) flow if I chop out this weirdo muffler?