Working on your BMW Oilhead engine? This top dead center (TDC) locking pin is a must-have tool for setting timing accurately. The part number is 83 30 0 401 523 (or 83300401523), and it's made by EnDuraLast with a chrome finish for durability. It's a universal fit for many BMW models with Oilhead engines, making valve adjustments or timing chain jobs much easier. Just insert the pin into the designated hole on the engine to lock the crankshaft at TDC, ensuring everything is aligned perfectly. This brand-new tool comes with a 1-year warranty and is essential for any serious BMW mechanic or enthusiast. It saves you time and prevents costly mistakes. Whether you're doing routine maintenance or a major rebuild, having the right tools makes the job smoother. Keep one in your toolbox for whenever you need to work on your Beemer. A simple, affordable tool that delivers professional results. No UPC applies.