Your insurance will be invalid anyway, if they inspect it like that.
If its going through his insurance, it won't matter if you've declared anything to your insurance company.
Don't worry about it.
insurance companies will look for any reason not to pay out. Then again if its the other parties fault it comes out his insurance. So I dunno how that will work
I declare absolutly everything. right down to LED interior bulbs, dont want to chance it if I crash
fingers crossed this works out for you, when i crashed my clio had a load of bits on it not declared and was fine but i consider that luck more than anything.
just play dumb about the wheels. you were told they were the factory wheels when you bought it etc