The DiabloSport Sprint Module allows for maximum power and vehicle performance by disabling the factory Active Fuel Management (AFM) feature that drops cylinders and reduces power. Easy installation. Just plug into the OBDII port under the dash and drive. Compatible with GM vehicles built from 2005 to current that feature Active Fuel Management (AFM). Eliminates hesitation on acceleration and annoying exhaust buzz caused by AFM activation. Enables vehicles with AFM to stay in V8 mode at all times without reprogramming or re-flashing the vehicle's onboard computer (ECU). Not legal for sale or use in the state of California at this time. 50 State Emissions Testing underway and status pending