2017-2019 Duramax 3.5" Intake Horn & PCV Reroute (L5P-INT-A044)

Note: Tuning is recommended. Custom tuning is required if performing a CCV Reroute.

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

Compatible with OEM gaskets.

Ditch the plastic and let your turbo breathe. The factory 2.4" OEM intake horn is a bottleneck that restricts the airflow your L5P needs to reach its full potential. We engineered our 3.5" Precision Machined Intake Horn to be a simple but high-impact upgrade, delivering a significant increase in airflow volume to the turbocharger.

This horn features a precision-machined anti-surge flange and a gradual taper down to the 3" turbo inlet, optimizing velocity while eliminating turbulence. Built to shop standards, it utilizes the factory O-ring for an OEM-grade seal and includes all new mounting hardware. Whether you’re looking for better throttle response, increased torque, or improved overall engine efficiency, this is the dialed-in fix for the L5P's restrictive intake tract.

Part Number: L5P-INT-A044

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.

• Massive 3.5" diameter provides enhanced airflow over the restrictive 2.4" factory plastic horn.
• Precision-machined anti-surge flange ensures smooth, efficient turbo induction.
• Gradual internal taper maintains air velocity into the 3" turbo inlet size.
• Engineered to work with plug-and-play tuners or full custom tuning software.
• Powder-coated finish available in Illusion Cherry, Gloss Black, or Raw for a custom engine bay look.

• (1) Dirty 3.5" Precision Machined Intake Horn
• (1) Complete Mounting Hardware Kit
• PCV Reroute option comes with all hardware necessary to reroute stock PCV