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Twice Pipes

A dual-exhaust system on a hot rod.

Twin

1. A two-cylinder engine. 2. An identical pair.

Twin I-Beam

A front suspension using two I-beams, each attached to the chassis at the end opposite the wheel, and coil spring at the wheel end.

Twin Torsion Bar

A suspension system having two torsion bars, one placed above the other.

Twin-Grip

A limited-slip differential by AMC.

Twin-Plug Head

A cylinder head having provisions for two spark plugs per cylinder.

Twin-Plug Ignition System

An ignition system having two distributors, two coils, and two plugs per cylinder.

Twisted Pair

Ant two separate, insulated conductors twisted together and used to carry a signal.

Two Cycle

A term used for two-stroke cycle.

Two In The Glue

A two-speed automatic transmission.

Two Plus Two

1. A term used for club coupe. 2. A four or five passenger two-door auto body with limited rear-Seat space.

Two Speed Axle Assembly

A heavy-duty, vehicle-axle arrangement having two different output ratios from the differential that are controlled from the cab or the truck.

Two-Bolt Main

An engine block in which the mains are held in place with two bolts each.

Two-Piece Drive Shaft

A type of drive shaft having two sections requiring a center support bearing mounted on the vehicle frame and universal joints at both ends and in the center.

Two-Piece Piston

A piston having a removable skirt.

Two-Piece Valve

A valve having a head and stem made of two different materials.

Two-Plane Manifold

An intake manifold with two plenums.

Two-Stroke Cycle

An engine in which the four events, intake, compression, combustion, and exhaust, take place in two stokes of the piston.

Two-Way Catalyst

A catalytic converter that oxidizes hydrocarbons and carbon monoxide, but has little effect on oxides of nitrogen.

TWV

Two way valve.