For all intents and purposes, no.
Adding $2500 in random aftermarket parts does not increase its genuine market value by $2500. Additionally the insurance company charged premium based on the assumption your car was stock, you can't very well expect them to now pay more than they were anticipating. In theory you could disclose all aftermarket goodies, premiums would increase BUUUUT you're still only insured for pennies on the dollar.
"Masked Bandit is a gateway drug for frugal spending." - Unknown303