Chevrolet 2012 Volt Video

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Chevrolet engineers modified the Volt’s engine and exhaust components – specifically the catalytic converter – by adding a secondary air-injection pump that streams ambient air into the exhaust stream to increase its ability to remove pollutants.

https://www.youtube.com/watch?v=x6karSCxu6k

“The Volt may be the most-technologically advanced vehicle on the road today with a long list of valuable benefits from gas-free commuting and refined performance to connectivity,” Perry said. “Future owners in California can now add HOV lane access to that list.”

The additional oxygen helps the catalytic converter remove even more pollutants than the already clean standard Volt.