Commonly Used Abbreviations - General Information: "H"
- HAC
-
High Altitude Compensation
- HC
-
Hydrocarbons
- H/D
-
Heavy Duty
- HO2S
-
Heated Exhaust Gas Oxygen Sensor
- Hg
-
Mercury
- Hgt.
-
Height
- HLDT
-
Headlight
- HO
-
High Output
- HO2S
-
Heated Oxygen Sensor
- HP
-
High Performance
- HSC
-
High Swirl Combustion
- HSO
-
High Specific Output
- HTR
-
Heater
- Hz
-
Hertz (Cycles Per Second)