Mercruiser 863903A03 V8 Big Block 8.1L (496 MAG) Heat Exchanger Replacement
Big Burjo's Marine presents the Mercruiser 863903A03 V8 Big Block 8.1L (496 MAG) Heat Exchanger Replacement. This non OEM MEC part is designed to replace Mercruiser part no. 863903A03 in GM V8 Big Block 8.1L 496 MAG engines. Built for marine use, this heat exchanger supports the cooling system for reliable performance on the water. Type: Heat Exchangers & Coolers. Brand: Mr Cool (USA). Tags: Heat Exchangers & Coolers, Marine Energy Systems.
SEO-friendly by design, this replacement is listed under marine parts and boat parts categories and suits heat exchangers & coolers applications. Free delivery Australia-wide on orders over $350. We deliver to every marina, port, coastal town in Australia, including Cockle Bay, Moreton Bay, and Fremantle. Big Burjo's Marine ships nationwide, ensuring prompt service to your next voyage.
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.