Hi Matt,

I'm afraid the serial number "4000803" doesn't tell us a lot. As I'm sure you know, the H22A is a 2.2-litre Honda VTEC engine from the 1990s, most commonly found in Japanese-market Preludes and Accords. It’s a high-revving unit producing up to 220hp depending on version. The number you’ve been given is a serial number rather than a specific model code, though the ‘4000xxx’ range suggests it’s a later, higher-spec engine. However, without more detail, it’s not possible to pinpoint the exact variant.