Stage 1 High Flow Intake Bundle Kit

Features:

• Improves airflow by up to 33%
• Increases throttle response and turbo spool-up
• Direct bolt-on installation, no tuning needed
• Fits stock trucks with no modifications
• Durable 14-gauge aluminum pipe construction
• Includes billet turbo resonator plate
• Upgraded silicone boots and T-bolt clamps
• Precision CNC-machined cast aluminum Y-Bridge
• Eliminates common factory boost leak points
• Compatible with factory EGR and throttle valve
• Custom powder coat finish for lasting durability
• Made in the USA

Unleash Real Power With Every Press Of The Pedal

If your 2011-2016 Duramax is still running the stock intake setup, you’re leaving serious performance on the table. The Wehrli Stage 1 High Flow Intake Bundle completely transforms how air moves from the turbo to the engine, unlocking better throttle response, quicker spool-up, and improved efficiency. Whether you’re towing heavy loads or just want your truck to feel more responsive around town, this kit delivers airflow gains you can feel. It replaces restrictive factory components with larger, smoother-flowing pipes that eliminate common weak points and boost leaks. Plus, it installs without the need for tuning or additional modifications, making it a no-hassle upgrade that bolts right onto a stock setup. You’ll also get a billet resonator plate that cleans up the engine bay and adds a more aggressive turbo sound. Finished in your choice of durable powder coat colors, it looks just as good as it performs. For truck owners who want more power without diving into a full build, this is a smart first step.

Built To Outflow And Outlast Stock Every Time

This complete kit includes a 3.5-inch passenger-side cold pipe, a 3-inch driver-side hot pipe, and a cast aluminum Y-bridge that together deliver up to 33% more airflow than the OEM setup. The factory pipes on the LML are known to flex, crack, or blow off under high boost, especially in work or tuned trucks. Wehrli solves this with precision mandrel-bent, 14-gauge aluminum pipes and heavy-duty silicone boots paired with T-bolt clamps for added strength and reliability. The Y-bridge itself is CNC-machined for a precise fit and significantly improves airflow into the intake runners and cylinder heads. Also included is a high-flow crossover pipe that’s 20% larger than stock, designed to take full advantage of the larger inlet on the Y-bridge. This setup retains compatibility with your factory throttle valve, intake heater, and EGR system. You don’t need tuning or extra upgrades to run it, which makes it ideal for both stock and mildly modified trucks. Designed, built, and tested in the USA, this kit is engineered to handle the real-world demands of towing, hauling, and daily driving.

Fitment: 2011, 2012, 2013, 2014, 2015, 2016 GM Sierra/Silverado 2500HD/3500HD LML Duramax

Notes:

• Compatible with 2011-2016 GM Sierra/Silverado 2500HD/3500HD LML Duramax
• Direct replacement for factory intercooler pipes and Y-bridge
• No tuning or additional modifications required for installation
• Connects to factory EGR, throttle valve, and intake runners
• Not legal for sale or use in California (Prop 65 warning)
• Includes billet turbo resonator plate for OEM intake horn
• Reuses factory intake temperature sensor with threaded bung
• Custom powder coat color options available
• Made in the USA with high-quality materials
• Designed for improved airflow, reliability, and performance
• Eliminates known failure points in factory intercooler piping
• Intended for use with stock or emissions-compliant setups