...This is a very rare NOS Porsche 904 "E" transmission gearset. It is a 2.00 ratio with a tooth count of 17:34. For verification, the part number is 904-302-909-10.

This gear set is not compatible with a standard 901 style mainshaft and requires the use of a 904 mainshaft with changeable 2nd gear.

This gearset is essential if you want to build a correct "vowel box". Using the stock "F" mainshaft just doesn't offer the same punch for short track or hill climb usage. Note that the syncrhonizer "dog" ring is missing in the photos.