1 3

Wehrli Stage 1 High-Flow Intake Bundle, Bengal Red | Chevy Silverado/GMC Sierra 2500/3500 HD (11-16) (WCF100278-BR)

Wehrli Stage 1 High-Flow Intake Bundle, Bengal Red | Chevy Silverado/GMC Sierra 2500/3500 HD (11-16) (WCF100278-BR)

WCF100278-BR

In stock

$1,483.13 USD
$1,529.00 USD $1,483.13 USD
Special Discounts May Apply at Checkout Sold out

The Wehrli WCFab Stage 1 High Flow Intake Bundle is designed to improve airflow between the turbocharger and engine on LML Duramax trucks, supporting better efficiency, throttle response, and turbo spool-up. Its upgraded hot-side intercooler pipe expands from the OEM 2.5-inch design to a 3-inch tube, while the cold-side pipe is a one-piece, 3.5-inch, 14-gauge aluminum replacement for the factory plastic assembly. A CNC-machined cast-aluminum Y-bridge provides 40% more airflow than stock, paired with a 3-inch fabricated aluminum crossover pipe. Together, these components increase total airflow by 33% over stock. Upgraded silicone boots help resist high boost pressure, while a billet resonator plate replaces the plastic factory part.

This kit fits 2011–2016 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD trucks equipped with the 6.6L LML Duramax Diesel engine. It replaces the factory intercooler piping and upper intake manifold components, addressing restrictive airflow paths and OEM weak points associated with boost leaks. The bundle includes hot- and cold-side intercooler pipes, upgraded silicone boots, the high-flow Y-bridge, upper crossover pipe, and billet resonator plate. It retains the factory intake air heater grid for cold-weather operation and remains compatible with OEM throttle valve and EGR controls. Designed to install on stock trucks without additional modifications, upgrades, or tuning, the kit is finished in Bengal Red powder coating.

Overview

The WCFab Stage 1 upgrade for the 2011-2016 LML 6.6L Duramax Diesel Chevy Silverado or GMC Sierra 2500 / 3500 HD truck improves airflow between turbo and engine for improved efficiency, throttle response, and spool-up. Eliminates weak points in OEM design that lead to boost leaks or complete failures in hard-working and high performance trucks. The High Flow Driver (Hot) Side Intercooler Pipe replaces the OEM two-piece 2.5” pipe with a larger 3" tube. The High Flow Passenger (Cold) Side Intercooler Pipe replaces the factory plastic two-piece pipe with a high flow, 14 ga. aluminum one-piece 3.5" tube. Includes upgraded silicone boots to withstand higher boost pressures than OEM components to increase reliability and eliminate blown couplers and horsepower-robbing boost leaks. This LML Y-Bridge Kit replaces the OEM upper intake manifold supplying air to the engine intake runners and cylinder heads. The OEM Y-bridge for these trucks is a restrictive part that creates a bottle neck in the air intake tract and limits engine performance potential. This kit includes a high flow, precision CNC machined, cast aluminum intake bridge (40% more airflow than stock) together with a unique, 20% larger than stock, 3" fabricated aluminum upper crossover intercooler pipe that allows you to take full advantage of the larger inlet diameter Y-Bridge. The combination improves total air flow by 33% over the stock setup providing maximum volume for the available space. This means you get the most out of your engine in terms of performance and efficiency. Incorporates factory intake air heater grid for superior cold weather performance. Billet resonator plate eliminates the stock plastic resonator for improved engine appearance and more aggressive turbo and engine sound. Compatible with OEM throttle valve and EGR controls. Finished in your choice of custom powder colors. This product is compatible with stock trucks requiring no additional modifications, upgrades, or tuning for install.

View full details