H Series Overview
Along with the B Series, the H Series (or more specifically the H22 and H23) was Honda's high performance engine from the 90's to the early 2000s. Introduced to the USDM in 1993 as the powerplant in the Prelude in a VTEC 2.2 litre and non-VTEC 2.3 litre, it quickly made a name for itself. In the 2.2 Liter/VTEC form, the engine supplied almost 200 hp and 160+ ft. lbs. of torque. In various forms the H series was also used in the USDM Accord as well as overseas in the Accord SiR, Accord Euro-R and Accord Type R.
The H22 was, and still is, a popular engine in the world of Honda swaps. Early on, the common swap was an H22 in a second-gen CR-X. More recently, the H2B swap has become popular, mating a H Series Engine to a B Series transmission. This allows a high-torque, performance-oriented swap without the extra work and cost of a K Series Swap.
The H22 is also a prime candidate for forced induction, especially turbos. A highly-modified all-motor H Series can produce up to 300 hp. With forced induction, 600+ hp is easily attainable.