I have the Pro Circuit
T4 with the big end cap (2"?) and it too is way too loud for the street. I have the stock exhaust
but it weighs a ton, will probably kill power (the bike runs great other than the crazy noise level), and since it's a 2000 I will have to remove the header to change the filter. I've heard that the quiet core and small endcaps don't quiet the T4 significantly. I've tried making a 1" end cap out of a soup can and copper pipe, which made it a little quieter, but not for long as it quickly spit the sucker right out the pack! I've heard that the FMF
Q is pretty decent noise and performance wise, but that they sometimes fall apart, probably not quite as fast as my homemade version. Anyone have any advice on a quiet/light weight/reasonably priced/decent performing exhaust? I bet someone makes one out of unobtainium...