So a non Lexus air filter is now classed as a modification the world has gone mad
Well, you should tell the insurance company about that sort of thing because it's not just a regular non-Lexus air filter, it's a "performance" air filter. So if you crashed the car, hadn't declared it, and the insurance company spotted it then they could use it as an excuse not to pay out. So best to be safe and tell them. Trouble is, Direct Line put it into the same category as anything else that increased the bhp by quite an amount and wanted lots of money for it. So I switched to Sky, who are much more sensible about mods.