Porsche 904 "H" transmission gearset. It is a 1.68 ratio with a tooth count of 19/32. This gear is not compatible with a standard 901 style mainshaft and requires the use of a 904 mainshaft with changeable 2nd gear.

This gear is taller than all of the standard 901 ratios fitted to the early 911's and would be good for a 914-6 GT trying to run a large variety of racetracks using a single gearbox.