Volt Regulator, IXYS Diode, Blk, Part 4019661 is a voltage regulator. It is designed and tested by Indian Motorcycle Engineers to ensure quality, durability and optimal performance through tens of thousands of miles of on road testing to ensure the part can withstand the life of your cycle. It's also undergone environmental, vibration, temperature cycling, humidity, salt spray, and water immersion testing. Spend more time on the roads and less time in the shop. As a brand that started in 1901, don't settle for anything less than OEM quality.