Features: 1.Fitment: Voltage regulator is specially designed, replacement for Kubota Tractor B4200, B5100, B6000, B7100 rs1104 j5000, the reference part number is 66611?55250. 2.Waterproof and Shockproof: The rectifier adopts high strength materials, with good waterproof performance, surface mount technology, strong shock resistance and anti interference ability. 3.Improve Engine Power: The voltage regulator can provide a stable voltage, directly improve the low speed torsion performance of the vehicle, improve the engine power, increase speed, and climb more effectively. 4.Save Fuel Consumption: Rectifier can improve ignition efficiency, make fuel burn more fully, improve fuel efficiency and reduce vehicle fuel consumption. 5.Improve Headlight Brightness: This replacement voltage stabilizer can improve light dimness or lack of lights, making the lights brighter than before. Specification: Item Type: Voltage Regulator Material: Aluminum Alloy Voltage: 12V OE: 66611-55250 Application: Aftermarket replacement parts, used to replace old regulators in refurbished original cars, meet or will exceed OEM standards, direct replacement, easy installation Rectifier Function: The rectifier uses a semiconductor diode to conduct current to rectify and control the power supply, provide a stable voltage for the battery, and improve the ignition efficiency of the engine. Fitment: Replacement for Kubota Tractor B4200, B5100, B6000, B7100 rs1104 j5000 Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!