I need to replace the rear muffler on my '90 80Q (the center muffler is still in good shape). How do listers who have tried the Stebro like it? I saw the Ansa mufflers advertised in the lastest Blau flyer, but the Stebro seems comparable in price to the Ansa sport muffler in the ad. Has anyone tried the Ansa sport? TIA. Andy 80Q