2019 Holiday Sale 15
GrudgeBox Builder's Kit
$ 3,495.00
Built to take high horsepower abuse found in late model H-D performance applications while providing elegant shift precision. Transmission Configurations GrudgeBox - Straight 1st, 2nd 3rd, 4th, 5th and 6th...
OD6: Overdrive 6-Speed Builder's Kit
$ 2,995.00
This is the ORIGINAL 6-speed design that revolutionized the American V-Twin industry. Yet, it’s still the best overdrive 6-speed built to this day…hands down. Our OD6 is built to comfortably...
DD6: Direct Drive 6-Speed Builder's Kit
$ 2,995.00
From an engineering standpoint, it is difficult to design a machine or mechanism that achieves multiple objectives with minimal compromise. An amphibious car is a good example. A few have...