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Vortec motors were introduced by gm in the mid 1990's for better fuel atomization, which is when the fuel mixes with the air. With a better fuel to air mixture allows for a more efficient combustion in the cylinders = more power, better fuel economy. The actual change is in the motor heads themselves and the intake. Many people swap heads and intakes on older model chevys for an easy 20- 25hp gain.

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13y ago

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