03-09 YZ450F YZ 450F Pro-X ProX Valves Valve Springs Spring Complete Head Kit Maverick X3 937 inches

937 inches

Dowel pins

• Both nut and stud have rolled threads for the strongest possible threads

Big bore stroker

03-09 YZ450F YZ 450F Pro-X ProX Valves Valve Springs Spring Complete Head Kit Maverick X3 937 inchesWORKS ON MULTIPLE YAMAHA 450cc ATVs AND DIRT BIKES SEE FITMENT CHART ABOVE FOR YOURS Pro X stainless steel intake and exhaust valves Pro_X valve springs OEM Retainers and collars Kibblewhite Viton valve stem seals Aftermarket valve buckets tappets Valve keepers Works with stock or built cylinder head All parts are brand new 1 year warranty* Everything is new in the original packaging. We are an authorized distributor and the original manufacturers