Rogue Ikon ($550) has lower tone & not too loud. Rogue DMS ($619) may be just a little louder due to second resonator delete & not quite as low toned. Another would be Remus sportexhaust. All would fit your XI & I believe they are what you are looking for...GL
Last edited by bimmer654; 07-19-2010 at 08:57 AM.