- H -

Hardware

1. The components that make up a computer system, such as a keyboard, a floppy disk drive, and a visual-display terminal. 2. The nuts, bolts, and accessories required to assemble an add-on component.

Hardwired

The physical connection of two pieces of electronic equipment by means of a cable.

Hardwired

Wired into a vehicle's electrical system. As opposed to a portable 12-volt accessory that can be plugged into a power point when needed, then removed.

Harmonic

The rhythmic vibration of a moving part or assembly.

Harmonic Balancer

A balance shaft or wheel that reduces or eliminates harmonics.

Harmonic Balancer

See harmonic damper.

Harmonic Damper

A term used for harmonic balancer.

Harmonic Damper

A product that attaches to the outside of an engine to control harmonic vibration inside. It is designed to prolong engine life by reducing wear on the main bearings and main journals and preventing crankshaft failure.

Harmonic Vibration

A rhythmic vibration of a moving part or assembly at a specific speed.

Harness

A group of electrical conductors laced or bundled in a given configuration, usually with several breakouts.

Harness

See racing harness.

Harness Clip

A metal or plastic clip used to secure a wiring harness to the car frame or body at various points, providing safe and neat routing.

Harness Connector

An electrical connector at the end of a wire or harness used to connect the conductor to a device or system.

HAS

High altitude system.

Hash

1. A form of electrical noise. 2. An unclear or messy section of a scope pattern.

Hat

A pipe-like housing for the injector on a constant-flow fuel-injection system.

Hat Trick

Three successive victories in the same annual event.

Hatchback

A passenger-car body style where a full opening hatch, including the rear window, lifts for access to the cargo storage area.

Hauler

1. A top-performing car. 2. A top-performing driver.

Hauling The Mail

Performance at peak efficiency.