This will fit 1988-2004 KX500. This is a complete OEM system right down to the rubber pads and rubber connector seal. All is in excellent condition. If you are restoring a KX500 this might be the best condition system out there and may be the only complete OEM Factory set for sale anywhere. Also comes with 4 new rubber o-rings to seal it at the head. This is not a mixed macthed set, i took this off my 1989 KX500 early on, so it is what came on the bike from the factory. $1,000.00... Cash Only... No Checks... No Codes... No Venmo.