Quote:
Originally Posted by Taylor95
The best you could get is something ceramic coated from the factory. I've seen ceramic exhaust paint though but I'm not sure how well it works. Basically it's supposed to increase exhaust velocity and improve scavenging. Plus it will add rust protection.
My wife's car has the same thing. I think it is supposed to allow consistent airflow. But let us know if you see an increase in mpg.
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I've had it off for a couple years, and yes it helped gain about half a MPG