New Norton Twins Gearbox Inspection Cover Gasket. Gasket will replace Norton part number 04-0057 and 040057. Suitable when used on AMC gearboxes. Fits many Norton Commando, Atlas, AJS, and Matchless twins. Please refer to your parts catalog for proper fitment.
•Made in England
•O.E.M Part number is 04-0057 or 040057