Genuine OEM Ford Flywheel Ring Gear, part number 1229521. This ring gear is mounted to the flywheel and provides the teeth that engage with the starter motor's pinion gear to crank the engine. Its precise tooth profile ensures reliable and smooth engagement, initiating the engine's combustion cycle. Manufactured from durable steel to withstand the forces of engagement and rotation. Genuine OEM flywheel ring gears are essential for a reliable starting system, ensuring the correct gear ratio and tooth hardness for longevity.