Small town roots, big dreams.
Aftermarket Diesel Filters
It's in my blood.

My Grandpa Doc was my hero (so much I named my business after him). He was in the automotive aftermarket parts business for 50+ years. Now I want to take what I learned from him and my father into the digital age and provide an incredible value to our customers. Grandpa Doc, this one is for you! Doc's Diesel.

- Max Nihart (Doc's Diesel Founder).

Doc’s Diesel is the new standard in aftermarket Diesel Filters. Our Premium Diesel Filter Line includes: Fuel, Oil, Cabin Air, Water Separator, and Air Filters. We set ourselves apart in a few different ways, mainly being the quality of our product. Our aftermarket parts are spec'd and designed to meet or exceed the quality and performance of the original filters (OEM's) that come in your vehicle