Ken Johnson and Norm McDonald, aka K&N, founded this automotive filtration company over 50 years ago. They developed the idea of automotive filters peforming in dusty and off-road conditions. Merchant Automotive offers their Cleanable Replacement Duramax Air Filters that are designed to boost horsepower and acceleration on your Duramax truck. These air filters can be cleaned and resused, and can last up to 50,000 miles.
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