Hey RC enthusiasts! If you're running an Element Enduro Sendero trail truck and want to improve both performance and durability, this brass gear box cover is a smart upgrade. Made from quality brass, this cover adds 70 grams of weight to the rear of your truck, which significantly improves traction and lowers the center of gravity for better handling on tricky terrain. The precise machining minimizes bearing gaps, resulting in more stable differential operation and smoother power delivery to your wheels. The oil fill hole design makes maintenance a breeze - no more completely disassembling everything just to lubricate your gears. This single-piece cover replaces the stock plastic version, providing much better protection for your rear gearbox against rocks, debris, and impacts that can damage internal components. It comes with four stainless steel cap head screws (2.5x14mm) for secure installation, and it's designed specifically for the Element RC 1/10 Enduro Sendero 4WD Offroad Trail Truck (#40100). The fit is perfect - no modifications needed, just swap it out and you're ready to hit the trails with more confidence. Whether you're crawling over rocks, navigating roots, or just want your truck to handle better, this brass upgrade delivers noticeable improvements in both performance and durability. It's one of those mods that experienced crawlers swear by for good reason!