I have an exhaust originally ordered for 03 zx9r. yoshimura Tri-oval Exhaust. Slightly used , I bought brand new last year, never down or anything. no scratches,dings etc. 240.00 obo. Great Condition. Can be used for 03-04 zx6r/rr but needs big exhaust gasket to do so. where the exhaust meets header, the yosh pipe diameter is a little larger than stock for 600's.