Yamaha Inner Gunwale, Aft - F4N-U255C-90-00. Precision-Made Interior Panel for Rear Gunwale Protection. The Yamaha - Inner Gunwale, Aft - F4N-U255C-90-00 is a genuine Yamaha replacement part designed to restore or maintain the structural integrity of your watercraft's aft section. This inner gunwale panel fits snugly into place, ensuring both durability and aesthetic consistency across your boat's interior framework.. Crafted with high-quality materials and precision engineering, this component