The 3" High Flow Driver side Intercooler pipe for the 2020-2023 L5P Duramax. Replaces the OEM two piece design with a high flow one piece 3" pipe. It also includes upgraded silicone boots that withstand higher pressure and temperature than the factory boots to increase reliability and eliminate blown factory boots.
Replaces GM Part Numbers: 84660608, 84870726
Reviewed by: tradd07/30/2021 03:47PM
Product ownership: Less than 1 month
Purchased from: Wehrli Custom Fabrication - WCFab
For to anyone thinking about this, you'll see an instant difference in intercooler performance and in turbo whistle. Instead of blowing up like a balloon, this solid pipe delivers pressure as soon as the turbo spins up.
To install, be sure to unplug the ECU connectors just above the lower intercooler input to give you room to work without damaging the wiring harnesses. I did my best and took my time and I still ended up with a few battle scars on the pipe, but I didn't do this for looks.
Great product and I plan to buy anything these guys make for the '21 L5P!
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