Already have our upper MAP Relocation Kit for your 2023½ L5P? Complete the set with this lower relocation kit to protect both of your 2023½-2025 6.6L Duramax's sensors from dirty exhaust gas and sticky oil buildup. A contaminated sensor can cause inaccurate readings, adversely affecting fuel economy and power output. The small billet aluminum device relocates the sensor out of the soot-filled exhaust stream.