1970's Golden Chevy Era - Rare V-8 Performance History Part 5
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This '70 350hp 402 big-block was ordered in a state that had no emissions rules and regulations-hence the engine had no A.I.R. (Air Injection Reactor), which pumped oxygen into the exhaust system. Yes, this did indeed restrict exhaust flow, but it also lowered NOX particulates. View Related Article
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