Its lighter weight than the Ford standard type, the synchro hub has less rotational mass and will exert less force on the 3rd and 4th gear baulk rings, this should extend like depending upon other circumstances, like driving style etc. ( Like a lightened flywheel)
If the small dog teeth on this hub are worn it can help to cause the gearbox to jump out of 3rd or 4th gears.
Will fit Type 9 transmissions fitted to:
Ford Sierra
Ford Granada
Ford P100
Ford Scorpio
Ford Transit
Ford Capri
Reliant Scimitar
TVR
Kit Cars