The R40 was a New York City Subway car model built by the St. Louis Car Company from 1967 to 1969 for the IND/BMT B Division. There were 400 cars in the R40 fleet, arranged in married pairs. Two versions of the R40 were manufactured: the original 200-car R40 order built in 1967–1968, and the supplementary 200-car R40A order built in 1968–1969. The 200 original R40s and the first 100 R40As were unique for their futuristic 10-degree slanted end (designed by the firm Raymond Loewy and Associates) and were nicknamed the R40 Slants or simply Slants.