Baker Drivetrain GrudgeBox - Black Door - M8 Touring Models 2017 later

Baker GrudgeBox, Black Door,  The GrudgeBox is a tough overdrive 6-speed to replace your stock 6-speed! The GrudgeBox was engineered with a focus on excessive torque capacity and crisp shifting. All gears are straight cut in a way that ensures maximum power transfer to the rear wheel. This gearset was designed and geared for the everyday highway riders, speed freaks, and even racers! Fits:  2017-Up M8 Touring, Black Door, Standard Shift Pattern *Does not fit 2023 and later CVO models. Built to take high horsepower abuse found in late model H-D performance applications while providing elegant shift precision. All gears are straight cut for negligible parasitic power loss, providing maximum power transfer to the rear wheel Wide-ratio gearing for heavier performance applications Built for aggressive take-offs and long distances at above-average speeds 250 RPM drop at higher highway speeds (approx. 80 mph) Engineering focus on excessive durability Gears up to 40% wider than stock Positive