Unlock the full potential of your 2004.5–2005 6.6L LLY Duramax diesel engine with high-performance air intake systems designed to boost airflow, throttle response, and overall efficiency. Known for its strong towing capability and reliability, the LLY Duramax benefits greatly from upgraded intake components that reduce restriction and improve combustion. At Norcal Diesel Performance, we offer premium options from trusted brands like S&B Filters and Banks Power, including cold air intake kits, turbo inlet manifolds, and Ram-Air systems. Whether you're looking for a cleanable cotton filter or a dry disposable option, these upgrades are engineered to deliver cooler, denser air to your turbo, translating into more power and better fuel economy. Give your 6.6L LLY Duramax diesel the airflow it deserves and experience the difference in performance and durability.
