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Home >> GMC >> 1981 >> Magnavan Automatic Trans, Trans Mfr CD 475/M40 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emission Systems >> Description >> Pulse Air Injection Reactor (PAIR)

Pulse Air Injection Reactor (PAIR)

This system, used on 250" 6-cylinder models, allows additional fresh air into exhaust system without using an air pump. A special set of check valves is used to respond to exhaust system pulses and draw in fresh air. As with the A.I.R. system, HC and CO emissions are reduced.