GM Duramax ACC-SILHO-GM-LLY - 6.6L - Silicone Intercooler Hose Kit (2004.5-2005)

Hold the boost. Protect the power. Upgrade your 2004.5–2005 LLY Duramax with a reinforced silicone intercooler hose kit built to handle heat, boost pressure, and long-term engine demands. Whether your truck is stock, tuned, towing heavy loads, or daily driven, this kit replaces weak factory rubber hoses with a stronger, more reliable solution.

Factory intercooler hoses on LLY Duramax engines are known to degrade over time—especially when exposed to heat, oil mist, and increased boost levels. This multi-layer silicone hose kit is designed as a direct-fit replacement to improve durability and reduce the risk of boost leaks. Built for performance and reliability, it helps maintain consistent airflow under demanding conditions.

Vehicle Fitment

2004.5–2005 GMC Sierra 2500HD / 3500HD – 6.6L Duramax LLY

2004.5–2005 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax LLY