03+ YZ250 YZ 250 Stock Bore Cylinder Head 66.4 Wiseco Complete Top End Parts Kit 1043-2 Features a 99mm MLS head

Features a 99mm MLS head gasket for high-compression engines

It includes a BPRATV 68mm big bore cylinder

Just as good as K&N for far less $$

91312-KE7-003

03+ YZ250 YZ 250 Stock Bore Cylinder Head 66.4 Wiseco Complete Top End Parts Kit 1043-2 Features a 99mm MLS head03+ Yamaha YZ250 YZ 250 Stock Bore 66. 4mm Complete Top End Cylinder Head Kit Fits all 2003 and newer Yamaha YZ250 2 stroke dirt bikes. Kit Includes: New aftermarket stock bore cylinder New cylinder head Wiseco or Wossner forged piston** Piston rings Wrist pin Circlips Complete top end gasket kit Head stud kit Additional Information: Piston is compatible with pump gas or race gas applications All parts are brand new Warranty included*