Mercury - Pro XS Cowling Decal Set OEM Engine Graphics Marine-Grade Vinyl Finish 8M0214865. Overview. A three hundred horsepower Pro XS isn't subtle, and it shouldn't look that way either. This genuine Mercury cowling decal set brings your four point six liter V8 Pro XS back to its factory-correct appearance, restoring the bold identity that belongs on an engine of this caliber. Whether you're replacing weathered graphics or finishing off a clean repower, this set makes the outboard feel complet