6.6L Duramax L5P High Flow | Y-Bridge 3.5 Inch | 2017-2024 GMC/Chevy
Note: This Y-bridge will not work with the factory turbo and requires custom fabrication. Ideal for builds utilizing an aftermarket turbocharger and charge piping. Introduction A 3.5" high-flow Y-bridge for 2017–2024 6.6L Duramax L5P engines running aftermarket turbos. The factory Y-bridge is a significant restriction in the intake tract once more air and fuel are added, and this upgrade replaces it to increase airflow and support higher boost. Compatibility Make Model Year Engine Chevrolet Silverado 2500HD 2017–2024 6.6L Duramax L5P Chevrolet Silverado 3500HD 2017–2024 6.6L Duramax L5P GMC Sierra 2500HD 2017–2024 6.6L Duramax L5P GMC Sierra 3500HD 2017–2024 6.6L Duramax L5P Features 3.5-inch high-flow Y-bridge that increases airflow over the restrictive factory unit 304 stainless steel construction, TIG welded Bead-rolled inlet for secure coupler retention Built for aftermarket turbochargers and custom charge piping Bolts to OEM intake runners using existing OEM hardware and seals Includes bungs for the MAP sensor and 1/8" NPT accessories (boost, meth injection, or data logging) Technical Specifications Material 304 Stainless Steel Inlet Diameter 3.5 inches Construction TIG welded Sensor Ports Factory MAP sensor bung plus a 1/8" NPT accessory bung Finish Raw stainless Benefits Removes the significant factory intake restriction when more air and fuel are added Supports higher boost and aggressive tuning Steadier intake flow under load Reduces coupler blow-off risk Handles extreme heat and race conditions Installation and Notes Bolts to OEM intake runners using existing OEM hardware and seals Requires custom fabrication, custom charge piping, and an aftermarket turbo Ideal for builds utilizing an aftermarket turbocharger and charge piping Not compatible with the factory turbo or OEM intercooler piping Race and off-road use only Frequently Asked Questions Is this a direct replacement for the factory Y-bridge? No. It's a performance upgrade for custom builds and requires custom fabrication, aftermarket intercooler piping, and often custom tuning. Will it work with the factory turbo? No. Aftermarket turbo setups only. Does it include sensor provisions? Yes. It includes bungs for the factory MAP sensor and a 1/8" NPT accessory port. Is tuning required? Not to install, but strongly recommended for aftermarket turbo setups.