An old thread I'm trying to figure stuff out from, for my V11S exhausts (bought the bike a week ago). The 2nd owner claims the mufflers are mistrals (he didn't put them on but the 1st owner did, apparently in 2002), I disagree them being mistrals based on the part number, it's #99 99 99 83, which on this thread, is a MG aluminum muffler option, discontinued by now (long gone it seems).
From the parts lists (GU01600 for '99-'01 V11S's, mine is '00), however, such an option is not shown anywhere, may be just the poor Guzzi documentation as usual. All I'm after is whether my theory is correct, the 99999983 (optional) aluminum-mufflers were Guzzi's slip-ons, not mistrals (?)
BTW, these sound great, runs great (just a few days of riding since purchased), for curiosity everything else exhausts wise seems original, crossovers and all (other than the K&N air filter element).
I understood the 99999983 was sold w/ some kind of kit incl. crossover, mine (crossover) is definitely the original.