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Air Pump

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The air pump or smog pump or secondary air injection, as it can be referred to, is a beltdriven pump that feeds additional air into the exhaust system to help the catalytic converter “burn” the unburnt exhaust gases. The 351M in BluFerd received a new LMC check valve in the intake manifold to feed the exhaust system. Some smog systems pump the air directly into the exhaust pipe. Air pumps are no long used on new vehicles and are considered horsepower draws.