In 2011, the 3.7 Cyclone V6 became a standard engine in the Ford Mustang replacing the 4.0L Cologne V6. It was commonly known and marketed as the 3.7L Duratec V6. The 3.7L Duratec has a cast aluminum alloy cylinder block with contemporary architecture. It has a removable rear main seal cover plate and a structural rear sump cast aluminum oil pan. All Cyclone engines have the same 86.6 mm (3.41 in) stroke. The additional displacement comes from an increased bore size by 3.0 mm comparing to the 3.5-liter version. In 2018 Ford discontinued the Duratec 3.7L V6 from Mustangs in favor of the 2.3L EcoBoost inline four.