i have a Remus on my 1.9, the original muffler was an insult IMO. it sounded like a riding mower with gas. the Remus is not loud by any means, but it does seem to be "loosening up" a bit. it got installed as a replacement during the rebuild of my Z3 after being totalled. as far as being "worth the $$$$," are you nuts???? $650+ for a muffler? i would find a universal muffler that i like and have it installed, or do it myself. maybe a Supertrap? it's not exactly rocket science, and shouldn't cost like it is either! i wonder how loud it would be without a muffler? maybe just a resonator would sound nice?