sat nav, rays alloys, silver metal door kick bars. Standard, but make sure they know you have them.
Exhaust. Standard is twin, bhp gain = negligable, say +5 to be safe
He also fitted a Plenum. carbon fibre engine top. Does this add bhp? I presume you mean engine cover? If so, no gain, purely cosmetic
He also fitted an Injen air filter. How do insurers classify this? as an upgraded air filter? or an induction system? Induction kit, bhp gain, technically, none but say +5 bhp to be safe
I've added my OPINION in red
Edit: Typo