well worth declaring all your mods. Few years ago my mate got rear ended whilst parked up in an old mk2 xr-2 he was cut out of the car & passenger aswell as the car folded up. Car got taken away & put in compound where the insurance company went & looked at it,he got fook all as it had different wheels,lowered,tinted lights,strut brace,rear cage,big boom box in the boot as they said this was modified & affected the original structure & strength of the car. Aload of the round ones maybe but if it was all declared it would of cost him another £100 & he was on fo a payout of £5000 all in all.