A few weeks back I went to Scarbrough Lexus Toyota, Told the service rep. I have a sulfer smell, he ordered new cats, pipes ... no hassle. I'v just got the truck back, with all the rain I haven't had the window down yet, so I can't say if there's any change. The Rep. did mention the cats have been revised again, and require a diffrent bracket, still on B/O from Japan.