Jims Fat 6 Super Gear Kit For Harley Constructed from aerospace-grade 9310 steel, this gearbox kit features an extra-wide straight-cut design. It delivers a robust six-speed performance suited for high-demand situations. The integration of a rigid billet aluminum trap door ensures exceptional load capacity and stability, making it ideal for high-performance applications without compromising integrity. When installed, it enhances gear shifting by reducing clunkiness and promotes smoother transitions, establishing dominance on the road with its impressive strength. Features: Gear teeth are straight cut with a 53 increase in width when compared to stock, allowing additional load capacity and strength Assembled into 6061 billet aluminum big bearing trap door for reduced flex in high performance applications Utilizes Jims quick shift ring technology minimizing annoying clunk when shifting Gear ratios similar to stock, with 1:1 final drive ratio Strongest and toughest 6-speed gear box made Stock OEM 6-speed performance upgrade Compatible with your stock gear selector Lightened one-piece steel shift drum Aerospace grade 9310 steel No modifications to case or exhaust mount required Made in the USA and assembled in Jims technologically advanced facility