GULL-WING DOOR:
Describes a roof-hinged door that opens upward first used on the Mercedes-Benz 300 SL in the early Fifties.
GUSSET: Describes a triangular plate secured across an angle to reinforce a joint.
GUSSET PLATE: Describes a triangular plate secured across an angle to reinforce a joint.
HAIRLINE CRACK: Describes a tiny stress fracture liable to form due to strains in material or extreme temperature differences.
HARDTOP: Describes a two-door or four-door vehicle without a B-post providing the impression of uninterrupted glass along the side of the car.
HATCHBACK: Describes a car design where the boot and lid are replaced by a rear hatch, including the rear window, while the back seat folds down.
HARDTOP CONVERTIBLE: Describes a fixed-roof coupe whose roof does not retract into the trunk, giving the impression of being a convertible,
HARDTOP STAND: Describes a type of collapsible stand that can hold a detached hardtop in a vertical position when stored.
HEADER BAR: Describes the front lateral bar on a car roof made of sheet steel that attaches to the top of the windshield frame and is usually shaped to match the top front edge to the curvature of the windshield.
HEADROOM: Describes the distance between the top of a passenger's head and the inside of the vehicle roof
HEEL PLATE: Describes the vertical transverse sheet metal panel that runs across the width of the car interior at the front edge of the rear seat linking the back seat well to the floorpan and provides rigidity for both panels.
HINGE FACING: Describes a part of the door frame, including the bracing and threaded plate used to mount a hinge to the door.
HOOD BOW: Describes one of at least four struts that support the car roof, usually made of tubular steel.
INJECTION-MOULDED: Describes objects produced by injection moulding.
INJECTION MOULDING: Describes the method of fabricating objects using thermoplastics.
INNER FENDER PANELS: Describes the set of vertical panels mounted to the left and right of the engine bay, providing the mounting flanges for the fenders and the top suspension.
INNER SILL: Describes the hidden part of the sill customarily located behind the outer sill panel, serving to reinforce the underbody.
JACKING POINT: Describes a specially strengthened point or points on the underbody of a car where the jack can be safely placed.
KICK PANEL: Describes a vertical panel wall enclosed by several structural members.
KICKUP: Describes the terminology used to describe a section of the frame and body raised to provide clearance for the front and rear suspension system or axles.
LAMP APERTURE: Describes the opening in a sheet metal panel where the headlight or taillight can be mounted.
LAMP PANEL: Describes the panel that holds either a headlight or taillight.
LEGROOM: Describes the amount of space available to passengers to stretch their legs in a vehicle.
LAYING UP: 
Describes the process of adding several layers of fibreglass mat and resin to form a glass-reinforced plastic (GRP) shell.
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