The Evolution 5-speed gearbox is fully designed and manufactured in-house by our team of experienced craftsmen. The outer casing is cast to the original design and dimensions so that it will be capable of fitting any E-Type transmission. The casing is then machined to accommodate completely new 5 speed gear components designed to the highest tolerances and built to handle over 350 bhp to the strict requirements specific to the Evolution powertrain and geared to the requirements of each client.