Welcome to Walker Engineering - home of the Walker AIRSEP® closed crankcase system for diesel engines. Originally configured for marine applications, the AIRSEP® is now available for all applications that use diesel engines, such as trucks, buses, RVs, Industrial engines, and electric power generation. New AIRSEPS® have been designed to meet the increasing popularity of natural gas-fueled engines, as well. For heavy-duty applications, our high-efficiency CCE® series AIRSEP® is the product of choice. A private company, Walker Engineering offers innovative products that apply cutting edge technology to solve problems in a unique and cost effective manner. Our Everquiet Air Filter Silencers, FUELSEP® fuel conditioning, and high performance air filter products, add quality, value, and emissions reduction to any diesel powered boat, vehicle or facility. Go with the name you can depend on and trust … Walker Engineering.