I have declared my Air Filter even though its a panel one and didn't effect anything its still noted down like Jj0063 said its not worth the risk.
I have had friends who have had insurance companies not pay out due to not declaring modifications like steroa head units ect.
Also worth noting that even if you buy a car with things like aftermarket stereo you still need to declare them.
I have had friends who have had insurance companies not pay out due to not declaring modifications like steroa head units ect.
Also worth noting that even if you buy a car with things like aftermarket stereo you still need to declare them.

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