BMP 6.7 Cummins Rear CAT Water Filter Adapter (2013-2024 Cummins)BMP Rear Water Separator Cat Adapter for your 13 18 or 19+ Cummins, This replaces the Rear Fuel Water Filter Housing and stays in the factory location using factory quick connects, no cutting or adding fuel line 100% plug and play! This works in line with our front mounted Cat Adapter and will save you an average of $75 a fuel filter change if you run both! Please note: If purchasing front and rear kits some trucks will require a replacement WIF