Fisheries Supply proudly brings you Walker Airsep, the pioneers of advanced air and fuel filtration solutions for diesel engines. Their renowned Walker AIRSEP® closed crankcase system, originally a marine champion, now tackles emissions and boosts efficiency in trucks, buses, RVs, and even power generation. No matter your engine, Walker Engineering has the answer. Walker Engineering is home to 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, boats, and even 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. Walker Engineering offers innovative products that apply cutting edge technology to solve problems in a unique and cost-effective manner. Our FUELSEP® and ALGAESEP® products add quality, value, and emissions reduction to any diesel-powered boat, vehicle, or facility. Our representatives are always available to help you choose the right marine air filter for your needs. Shop our selection of marine air filters from top brands like Walker Airsep today to ensure your boat's engine is running smoothly.