Cummins 5.9L B Series Aftercooler 3979771 Complete Assembly Replacement
Introducing the Cummins 5.9L B Series Aftercooler 3979771 Complete Assembly Replacement from Marine Energy Systems. This direct-fit assembly replaces Cummins part numbers 3979771, 5566841, 5267875 and 4302547, delivering a seamless upgrade for Cummins B Series marine engines in boats, pontoons and workboats. As a complete aftermarket solution, it is engineered to meet or exceed the original performance, providing reliable heat exchange and cooling in demanding saltwater conditions.
Built for the toughest Australian marine environments, this aftercooler comes as a full complete assembly designed for durability and easy installation. Inside the box you’ll receive a full aftercooler assembly to replace the original unit, ensuring dependable operation across saltwater use. Ideal for boat parts and boating supplies, it serves boat owners around Wollongong, Geelong, Sydney Harbour and Townsville seeking marine parts Australia.
Compatible with Cummins B Series marine engines, this replacement keeps your engine running smoothly at sea and in marinas. Free delivery Australia-wide on orders over $350. Shop Big Burjo's Marine for all your boating needs.
Details
Full specifications, features and technical details for this product are listed in the description above. Need help checking compatibility with your vessel, caravan or 4x4? Contact our Gold Coast team on 0416 180 996 or sales@bigburjos.com and we'll confirm fitment before you order.
Shipping & Returns
Shipping (Australia-wide): Orders over $350 AUD ship free. Orders under $350 have a $15 AUD flat-rate delivery fee. Standard delivery takes 3–11 business days depending on your location; express options (1–3 business days) are available at checkout. Orders are dispatched within 1–2 business days.
Returns: We offer a 30-day return policy. Items must be unused and in original packaging. Contact us at sales@bigburjos.com or 0416 180 996 to start a return. See our full Shipping Policy and Refund Policy for details, including your rights under Australian Consumer Law.