This kit replaces the problematic factory hydraulic roller lifters and camshaft to a reliable flat tappet. It is 49 state certified. We are confident it would pass CARB testing, but we don't do business in California. This kit will fit and is emission certified for all Ram 2019-2024 2500 and 3500 diesels not in California. It comes with - 178/208 Forged camshaft - DLC coated  steel tappets - upgraded pushrods - Adjustable rocker arms with DLC coated trunnions See link for install kit from DNR customs! DNR Cam Removal Tray With Complete Removal/Install Kit for 19+ Cummins - DNRcustoms.com People have noticed an increase in spool up and throttle response, fuel economy gains and EGT reductions, all on stock vehicles with OEM tuning and all emission equipment present.   Click on the description tab below for more information.   If you are looking for installation, here is a list of qualified installers. DNR Customs in Wales, MI Unrivaled Diesel in Weatherford , TX Powerhouse Machine in  Edmonton, Alberta Central Florida Diesel in Cocoa West, Fl Point Blank Performance in Joneseboro, AR Crustin's Diesel in  Bertram TX Armor Inc. Diesel in Red Deer Alberta Duernberger Diesel Service, Iron Ridge WI Diesel Works, Fort Worth TX