Should fit an astra easy enough. F40 fit vectra c n im fitting a astra g box to mine so should be easy enough to make it fit. (I assume anyway)
Im going from dual mass to solid, to save money on the flywheel clutch setup.
i have a z20let lightened flywheel, c20let clutch and astra gearbox. Just makes the clutch setup cheaper and a better setup so will spin up faster.