| Ignition System |
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| Electrical system devised to produce timed sparks from engine spark plugs. Consisting of a battery, induction coil, capacitor, distributor, spark plugs and relevant switches and wiring.
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| Import Name Plate |
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| Vehicles sold by manufacturers primarily located outside North America whether assembled Overseas or in North America.
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| Importer |
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| An organization that typically operates at arms length or under contractual agreement with manufacturers to bring products made in one country into another |
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| Independent Repair Shops |
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| mall service outlet offering specialized repair services. They usually do not sell gasoline. |
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| Independent Suspension |
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| Suspension in which each wheel is sprung individually so that any disturbance on the wheel has no effect on the opposite wheel.
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| Inline Engine |
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| An engine having the cylinders in a straight line, one after the other. Also called a "straight" engine.
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| Intake Charge |
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| The mixture of fuel and air that flows into the engine.
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| Intake Manifold |
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| The network of passages that direct air or air-fuel mixture from the throttle body to the intake ports in the cylinder head. The flow typically proceeds from the throttle body into a chamber called the plenum, which in turn feeds individual tubes, called runners, leading to each intake port. Engine breathing is enhanced if the intake manifold is configured to optimize the pressure pulses in the intake system |
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| Intercooler |
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| Essentially a radiator or heat exchanger used to cool the heated compressed intake air for the engine. The cooled air is denser and can provide more power and also reduces pinging/detonation. Intercoolers are used for both turbocharged and supercharged engines. Most intercoolers are air-to-air type, which means that ambient air is used to cool the compressed intake air. Less common air-to-water intercoolers use engine coolant to shed heat from the intake air. An intercooler resembles a radiator; it houses large passages for the intake flow, and uses either outside air or water directed over it to lower the temperature of the intake flow inside.
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