Gear kit to fit the 4-speed single rail gearbox suitable for demanding applications. The gearbox is available most often without an integral bell housing, allowing you to choose the gearbox to suit your engine and clutch type from the list below.

As you can see below the Rocket is well catered for with a huge range of ratios including the highly successful Hot rod, F2 and Rally gear kits. Please use our speed calculator to choose your ratios and then select the appropriate ratio code from the drop down box below.

All rocket gear kits are supplied with standard mainshaft comprising 1st, 2nd, 3rd mainshaft speed gears, first motion shaft and assembled layshaft cluster. Comes complete with full gasket oil seal and bearing set. *

 * Includes additional bearing race and caged needle roller assemblies. Does not include the layshaft and mainshaft roller bearings, present in your donor gearbox.