This is an original 80-page Sig Erson Racing Cams Catalog for 1971 with cams listed for GM, Ford, Chrysler, AMC, Porsche, VW, an import section for Italian, British, French apps, Vega, Pinto, Cricket, Colt & Motorcycle listings for BSA, Ducati, Honda, Harley, Triumph & single cylinder apps, technical listings, accessories and more.