Quote:
Originally Posted by darcane
I believe the air pump was needed for carbureted engines in order to keep the mixture flowing into the catalytic converter lean enough to not kill it. If the EFI has an O2 sensor, I don't think an air pump will be required.
My guess is that nearly everywhere you go, you will be told it's a bad idea. Maybe try Stan's Headers in Auburn. They are probably used to getting oddball requests and could point you in the right direction even if they don't do the exhaust work themselves.
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The air pump was more of a bandaid to pass emission tests by just adding clean outside air into the exhaust pipe diluting the pollution so it met the sniffer test. It didn't really improve emissions at all, in fact it hurt them because it required horsepower to drive the pump. A silly loophole.
I suppose this is not true for every motor out there, but I suspect this was Dodge's reason they used them.