17-21 GM L5P 6.6L Durmax Calibrated Power Intake Horn Anti-Surge Ring

L5P Intake Horn Anti-Surge Ring is the essential piece you need for your L5P Duramax. We strongly recommend the WC Fab Open Intake Horn for your truck (regardless of which turbo you're running). With the added airflow, this Anti-Surge Ring will get you the performance you want without the potential damage that comes from a surging turbocharger. 

Furthermore, the stock intake air-horn on the L5P is commonly replaced because it necks down just before the turbocharger which creates a low-pressure zone in front of the turbo.  This low-pressure zone lowers turbo efficiency at "high load". 

Aftermarket intake air horns have a larger inside diameter compared to stock.  This helps to keep the turbo inlet well fed. Keeping the turbo well-fed is extremely important when using our Stealth 64 and Stealth 67G2 turbos where the factory air-horns anti-surge ring (2.4 inches) literally chokes the inlet of the Stealth (2.65 inches).  To protect against surge and give the best flow possible we've designed anti-surge rings matched to the compressor inlet for use with an aftermarket open style intake air-horn.  The L5P Intake Horn Anti-Surge Ring is essential for your performance built L5P Duramax.  These kits include new studs, O-ring, and nuts needed for installation. 

• Billet Anti-Surge Ring
• Made in USA
• Installation accessories included
• Prevent turbo surge when using Open Intake Horn
• Get the maximum amount of cold air

Calibrated Power: DT116000000001