Modeled after the now exceedingly rare Alfin brake drums from the 1950s, these are brand new drums made in the UK. They are therefore a period correct performance modification. Special Grade 17 cast iron liners form the friction surface and are mechanically sealed into the aluminum drum casting. Expect weight savings on the order of 25 to 30 percent and far more efficient heat dissipation. And, of course, the great looks are undeniable. Sold in sets of four only. These are made to order only; allow 6-8 weeks for delivery.