Norton twin feathebed exhaust header pipes, left and right, model 88 99 not model 7. This is not the exact same shape as the original model 77 pipes but they do fit and look good. These pipes will fit wideline or slimline, however it is necessary to cut to length for the wideline models.Original part number:H12/2/165 (RH); - exhaust pipe (right hand)H12/2/165 (LH); - exhaust pipe (left hand)