Includes AFM ('20-'21)/ DFM ('22-'24) and NPP Valves. Do NOT install on vehicles without O.E. NPP. System contains Polyphonic Harmonizer and SwitchFire™ Technology Valve actuator recalibration required after installation After installation, the exhaust valve actuators should be re-calibrated according to GM Document ID 5406413. BORLA® Performance Industries recommends taking your car to the nearest Chevrolet dealer for exhaust valve recalibration services. System ships in 2 boxes See below for additional Product Features & Benefits
After installation, the exhaust valve actuators should be re-calibrated according to GM Document ID 5406413. BORLA® Performance Industries recommends taking your car to the nearest Chevrolet dealer for exhaust valve recalibration services.