Pay in 4 interest-free payments of $41.84 Learn more
Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
and comes standard with the Pro Feature Set for full diagnostic and logging control
making your truck feel more responsive
We wanted an oversized filter that not only looked great
We deliver up to 5 custom tune files so you can flash the right power level when needed
bolt-on fitment
GDP 3.5" Downpipe (2017-2023 Duramax L5P) LMM and comes standard with theGDP 3. 5" Downpipe (2017 2023 Duramax L5P) Maximize Exhaust Flow. Lower EGTs. Improve Turbo Response. The GDP 3. 5" Downpipe, engineered for the 2017 2023 Duramax L5P, is built to reduce backpressure, improve turbo spool, and lower exhaust gas temperatures (EGTs). Designed for serious truck owners who need better airflow, stronger pulling power, and improved efficiency, this upgrade is the direct fit solution for increased durability and performance.
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