The MSD Ignition Tach Adapter PN 8912 is a brand new old stock performance part designed for automotive applications. Manufactured by MSD, this tach adapter is known for its high-quality construction and compatibility with a variety of ignition systems. Specifically designed as a performance component, this adapter allows for accurate monitoring of engine speed and timing, making it a valuable tool for enthusiasts looking to optimize their vehicle's performance. Ask questions before buying thanks.