The two liter DOHC-VTEC engine developed for the Honda S2000 produces 179kW (240HP, which is 120HP per liter). It is the highest output power among all naturally aspirated two liter engines ever mass-produced. It also achieves an exhaust emission level within National LEV standards. The new engine utilizes a redesigned VTEC cylinder head, in which MIM (metal injection molding) rocker arms are used. The new cylinder block with a ladder frame structure for its lower part, a newly developed camshaft drive chain and gear system and a metal honeycomb catalyst with an air pump start-up system are also utilized.