If you need a 6.6L Duramax cold air intake to boost your truck’s performance, you’ve come to the right place. Norcal Diesel Performance carries a huge selection of air intakes and accessories from the industry’s most trusted names. These parts will give your truck improved fuel efficiency and horsepower by increasing the overall airflow into the engine. This boost in performance is great for a variety of applications, such as towing a trailer or taking your truck off-road. We hope to be your one-stop shop while you search for 6.6L Duramax cold air intake systems. If you need any assistance finding the right products for your truck, don’t hesitate to contact us today.