These cams are fully compatible with the AVCS system and have been proven to dramatically increase power without sacrificing drivability. Power comes on in the lower rpm range (approx 2500-3000) and continues well past redline. Ground from new chill cast billets and sold in matching sets of four. Intake Duration: 278 Degrees Intake Lift: 10.74mm Exhaust Duration:274 Degrees Exhaust lift: 10.0mm. Improved valve train is highly recommended and ECU tuning will be required for maximum performance.