DUBLIN, May 25 (Reuters) - Aircraft leasing firm SMBC Aviation Capital has agreed to buy an additional 14 Boeing 737 MAX aircraft with a low-cost configuration, with deliveries due to begin later this year, it said on Tuesday. The company, which had previously dislosed firm orders for 89 MAX jets and a commitment to a fleet of 133, last year deferred delivery of 68 of those jets by four years until 2025-2027. (Reporting by Conor Humphries, editing by Louise Heavens) Our Standards: The Thomson Reuters Trust Principles.