Upgrade for 2011-2016 engines only: we replace the original connecting rods and pistons in your remanufactured long block with later-style (2017+) Ford connecting rods and matching pistons with 35 mm wrist pins. 2017-2019 6.7L Power Stroke engines already have this rod and piston design from the factory, so this upgrade isn't offered for them. Fits the 2011-2016 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 in the engine before shipping only (it replaces the rods and pistons during the build).