Thermactor Air Injection Manifolds
Beginning with the 1968 model year, all vehicles sold in the USA were required to meet new federal standards for hydrocarbon (HC) and carbon monoxide (CO) emissions. One of the more effective ways to reduce these pollutants was through the use of a thermal reactor (thermactor) system. Thermactors inject pressurized air immediately downstream of the exhaust valve in order to continue the combustion reaction to reduce the amount of HC and CO at the tailpipe.