The Honda H-series was a family of high-performance inline-four engines produced from 1991 to 2002. These all-aluminum dual overhead cam (DOHC) engines were prized for their high power output, high-revving capabilities, and tunable nature. Primarily featured in the Prelude, they were also used in certain Accord models. The two main displacements within the H-series were the 2.2-liter H22 and the 2.3-liter H23.
