Hate to be redundant since this is posted in gen F discussion but thought the technicians on the chat focus here. My 575 has a tubi and Stebro straight pipes.No problems for 2500mi (love the sound).However for the last few weeks whenever the throttle is hammered a hydrogen sulfide smell wafts into the cockpit.Then when just cruising the smell disapears. Here is serv.mgr explanation as possibility. By putting on a tubi one creates a high flow exhaust system so that the exhaust gases are exposed to the cats a shorter time thus less breakdown of noxious substances,When srt pipes are added to the system,2 silencers are removed further adding to the high flow since the silencers(mufflers) would have further restricted the flow and now it is an even higher flow exhaust. Of course this begs the question as to why now since this system has been on the car for the last 2500 miles??? Any ideas?