welcome to the site mate in respone to your qs it says there is a high/low boost setting - is this just a switch and can you change the amount of boost it boosts at? yes indeed it is, if you have it pressed in the car boots 0.5bar, if u depress it, it is 0.7 bar, its supposed to make it safer on less pleasant weather days apart from a filter and exhaust, it seems pretty standard - what would you recomended mod wise would be the first mods as such? id get used to it like that first, but most people tend to either go for new alloy wheels and new shocks/springs or coilovers, u may also wish