Just on with getting my c16xe back on the road, keeping it standard for now but wanna start collecting bits for winter when I plan on making a few changes power wise,which also got me thinking about the gearbox, at the moment iv got the gearbox that came out of the corsa gsi believe it's the f15, done a little bit of research and I believe the final drive is a bit of a pain to change compared to the f13, I want better acceleration but still want to be able to take it down the motorway, anyone had any experience with this ? Would I be better changing to a f13 box with a 4.18 final drive or will that compromise tip end too much any advise would be greatly appreciated cheers