New Motorcraft primary (engine-mounted) water pump: PW-502 for 2011-2016 engines, PW-571 for 2017-2019 engines. We match it to your model year (and check your VIN on 2017 trucks with dual alternators). The primary pump is the same for pickups and cab and chassis trucks. This is not the secondary (charge-air cooler) pump, which differs between single- and dual-alternator trucks. Fits the 2011-2019 Ford F-250/F-350/F-450 pickup and F-350/F-450/F-550 cab and chassis 6.7L Power Stroke. Add-on for our remanufactured 6.7L Power Stroke long block; installed before shipping or shipped loose in the crate, your choice.