We are now offering a complete Volvo M40 straight cut close ratio gearbox as well as the Quaife gear sets on their own. A complete 4 speed synchromesh gear kit with straight cut gears for minimal power loss, closer ratios for maximum performance and needle roller bearing support for mainshaft gears. Retains standard mainshaft. Fits late M40 gearboxes with the larger countershaft diameter of 18.3mm. These gear sets are manufactured for us exclusively by Quaife.