Racing Performance

GrudgeBox Builder's Kit

$ 3,695.00

2007-2016 Touring, 2007-2017 Softail, 2006-2017 Dyna, Polished Door, Standard Shift Pattern 2007-2016 Touring, 2007-2017 Softail, 2006-2017 Dyna, Polished Door, N1 Shift Pattern 2007-2016 Touring, 2007-2017 Softail, 2006-2017 Dyna, Polished Door, Reverse N1 Ignition Kill Shift Pattern 2007-2016 Touring, 2007-2017 Softail, 2006-2017 Dyna, Black Door, Standard Shift Pattern 2007-2016 Touring, 2007-2017 Softail, 2006-2017 Dyna, Black Door, N1 Shift Pattern 2007-2016 Touring, 2007-2017 Softail, 2006-2017 Dyna, Black Door, Reverse N1 Ignition Kill Shift Pattern 2017-Up M8 Touring, CVO Charcoal Door, Standard Shift Pattern 2017-Up M8 Touring, CVO Charcoal Door, N1 Shift Pattern 2017-Up M8 Touring, CVO Charcoal Door, Reverse N1 Ignition Kill Shift Pattern 2017-Up M8 Touring, Black Door, Standard Shift Pattern 2017-Up M8 Touring, Black Door, N1 Shift Pattern 2017-Up M8 Touring, Black Door, Reverse N1 Ignition Kill Shift Pattern 2017-Up M8 Touring, Polished Door, Standard Shift Pattern 2017-Up M8 Touring, Polished Door, N1 Shift Pattern 2017-Up M8 Touring, Polished Door, Reverse N1 Ignition Kill Shift Pattern 2018-Up M8 Softail, Black Door, Standard Shift Pattern 2018-Up M8 Softail, Black Door, N1 Shift Pattern 2018-Up M8 Softail, Black Door, Reverse N1 Ignition Kill Shift Pattern 2018-Up M8 Softail, Polished Door, Standard Shift Pattern 2018-Up M8 Softail, Polished Door, N1 Shift Pattern 2018-Up M8 Softail, Polished Door, Reverse N1 Ignition Kill Shift Pattern

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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...

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