Fitment - Ignition coil module for series engines including FH430, FH500V, FH531, FH541V, FH580V, FH601V, FH641V, FH680V, FH721V, FH601D, FH641D, FH680D, FH721D. Function - Replacing the ignition coil enables faster engine start-up and smoother operation. Improves engine operating efficiency and electrical performance, providing better recovery and response. Direct replacement for old or damaged ignition coils to restore normal engine function. Quality - The ignition coil module is constructed from high-quality materials, offering long service life, wear resistance, and no deformation. Designed carefully and rigorously tested before shipment to ensure product reliability and performance. Installation - Cost-effective solution to restore engine performance by replacing the ignition coil at a fraction of the cost of engine replacement. Operates reliably under all engine conditions and enhances ignition energy for quick start-up. Manufacturer Part Number: 21171-7024, 21171-7026, 21171-7034, 21171-7037 Replaces Part Number: 21171-7001, 21171-7006, 21171-7007, 21171-7013, 21171-7018, 21171-7022, 21171-7024, 21171-7026, 21171-7034, 21171-7037, AM121820 Color: Black + Silver Material: Metal + ABS Package Contents: 2 x Ignition Coil Note: Light reflection and different displays may cause slight variations in the color of the item compared to the picture. Measurement may vary by +/- 1-3 cm.