My previous setup before Akrapovic was Meisterschaft GT w/ challenge sport (HFC) xpipe. Sounded awesome and everyone thought I was crazy for getting rid of it. It was pretty loud but I love loud. I switched to akrapovic evolution for the weight savings and quality but I need something a bit louder. I sold my akra xpipe and got a catless challenge but it still didnt make it loud enough. I wish I could have akrapovic with a Catless meisterschaft sound
. Akrapovic also looks the best from the rear end.