ive seen many people put a load of bolt ons on the car and not made the power they expected, id advise getting a remap to gain the most out of your mods, ive done N/A mods on my type r crx and got good gains on the dyno map, but im looking at getting an aerodeck and going forced induction now the gearbox would be just for ratios, you wont gain bhp from a S80 gearbox.......