Those interested in a 2012 Chevrolet Volt will be pleased to know that a low-emission variant will begin selling in California. The modifications will allow the Volt to be eligible for the state’s High Occupancy Vehicle lane usage, and owners will be eligible for an extra $1,500 worth of rebates from California’s Clean Vehicle Rebate Project.

The Volt also had to receive minor powertrain changes in order to qualify. Specifically, engineers installed  a “secondary air-injection pump that streams ambient air into the exhaust stream to increase the ability of the catalytic converter to remove pollutants.” The new feature is appropriately named the  Low Emissions Package and will be offered on the 2012 model. The Volt’s Low Emissions Package will be standard for California.