Handle fast freight on your HO railroad with the rugged WalthersProto SD45! Introduced in 1966 with a 20-cylinder 645 prime mover cranking out 3600 horsepower, SD45s quickly became the preferred power for expedited freights and piggyback trains, going on to new careers with regionals and shortlines into the 1980s and beyond. Ready for service, features of these WalthersProto replicas include: