that was actually a common practice by dodge, chevy and ford starting in the 70's and continued well into the 90's? they were called "smog pumps" and it was an air pump that was plumbed into the exhaust manifolds by each cylinder. i'm working on an 89 lincoln mark VII with a buddy of mine right now and it's hard to find that smog pump. they had a high failure rate because they were oil less air pumps... and since they weren't a closed system like an a/c pump with a lubricant in them they dried up and seized A LOT. it's honestly a BS approach to it, but it just goes to show how narrow minded they can be... your car isn't polluting any less, but it's "cleaner" at the tail pipe, so it's good.