954473 Cylinder hold down nuts

When you are performing top-end service or tuning and need to rotate the crankshaft with the heads removed, these MCS cylinder hold-down nuts are essential workshop tools. Sold as a pair, these nuts, part number 954473, are cleverly dual-threaded on both ends, making them compatible with the cylinder studs found on 1999 to 2017 Twin Cam engines as well as 2017 to 2026 Milwaukee-Eight models. By securing the cylinders firmly to the cases, you prevent the base gaskets from breaking their seal while you work on the bottom end or time the cams. They are a simple, robust solution for any mechanic working on modern Harley-Davidson powerplants, ensuring the cylinders stay exactly where they should during critical service intervals.