2011-2016 Duramax Cold Side Crossover Pipe w/o Throttle Valve (LML-INT-A027)

Fits

Note: Built for trucks without a throttle valve. Click Here for the throttle valve ON variant.

Select custom colors are not regularly stocked; please allow an ETA of 2-3 weeks for coating.

Improve intake flow on your 2011-2016 LML Duramax with the Dirty Cold Side Crossover Pipe. This precision-engineered solution replaces the restrictive OEM intake on your diesel engine and is designed for trucks running without a throttle valve. By eliminating the rough, inefficient cast-aluminum intake, this kit improves airflow and reduces unnecessary restrictions, thereby optimizing efficiency.

Its smooth interior finish and circular cross-section ensure improved flow dynamics compared to stock, while the four-axis CNC-machined flange seamlessly transitions airflow into the intake plenum. This design not only enhances performance but simplifies the upgrade process with adaptability to both OEM and aftermarket intercooler piping.

Built from 6061 aluminum, TIG-welded, and powder-coated in-house, this kit is durable and visually impressive. Whether you're upgrading for performance, reliability, or aesthetics, this kit is built to meet your needs while allowing flexibility for further modifications.

NOTE: This Product Deletes the Grid Heater and Requires Custom Tuning (Throttle Valve Off).

Part Number: LML-INT-A027

Why Shop Dirty?

• Canadian-Made Performance: High-performing parts made in-house in our shop in West Kelowna and sourced from across North America with the highest quality standards.
• Born in the Shop: Our parts are engineered with real-world experience. Whether it's an OEM fix or a performance upgrade, we build what we know works. We make our parts to solve real-world problems.
• Dirty Made Quality: We aren’t just designing the kits; we are installing them every day in our own shop. We use our own products every day. From the first weld to the last bolt, we build tough gear that actually fits, handles abuse, and looks the part.

• Replaces restrictive OEM cast aluminum intake for improved airflow
• Smooth interior and circular cross-section minimize air boundary layer drag
• Four-axis CNC-machined flange ensures a smooth, efficient transition
• Eliminates the grid heater and throttle valve for reduced restrictions
• Quick coupler design provides compatibility with OEM or aftermarket intercooler piping
• 6061 aluminum construction with TIG-welded, high-quality welds
• Powder-coated finish with customizable color options

• (1) Cold Side Crossover Pipe w/o Throttle Valve
• (1) Set of Custom SAE-spec silicon boots and clamps for secure connections
• (1) Resonator Delete Plate

Click Here For Instructions