Reach Higher RPMs. Let your HEMI Charger dominate the streets with the help of Comp Cams’ Thumpr NSR 214/233 Camshaft. With its 268-degree intake duration and 295-degree exhaust duration, this camshaft is capable of increasing and providing a more consistent airflow. This results in an improvement in your engine’s performance. Plus, it allows your Charger to hit higher RPMs, giving the vehicle a significant boost in horsepower gains.No Springs Required. This camshaft is compatible with your factory valve springs, so there's no need to remove and replace your stock springs, saving you time and money.Not CARB-Certified. This camshaft is not CARB-certified at this time. Therefore, it is not legal for use in California or other states adopting California emission standards.One Year Limited Warranty. Comp Cams warrants that this camshaft will be free from defects in material and workmanship and against excessive wear for a period of 12 months from the date of purchase. Some exclusions may apply; please see manufacturer's warranty for details.Application. The Comp Cams Thumpr Camshaft is designed for use on 2006-2008 5.7L and 6.1L HEMI Dodge Charger models.