Vincent HRD Top Quality new parts. Also read the full listing description. 879 & FT161/1 Cylinder Head Nut Set of four of each in Stainless Steel. Manufactured in England. Fast Postage Royal Mail Tracked 24, Fit and Forget. Top Quality, Made in England. Order one set for Comet or Two sets for Twin Cylinder Engines. Supplying Top Quality Brand New Spares to help keep you on the road. Part you need not listed Send an ebay message and I'll list it for you.