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The WCFab 3.5-inch high-flow passenger-side intercooler pipe for 2017–2019 L5P 6.6L Duramax replaces the factory plastic two-piece design with a 14-gauge aluminum one-piece pipe. It uses a CNC-machined flange with double O-rings, an upgraded silicone boot and stainless T-bolt clamps to eliminate boost leaks and withstand higher pressures, and includes provisions to reinstall the OEM intake temperature sensor for a bolt-on fit with no tuning required.
Wehrli 17-19 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Bengal Blue
