[ArthurS]

Sybir is right. If you alter your car in ways that can harm the safety to yourself or passengers (airbags, seatbelts, etc) then a insurance company can deny a claim.

But, Nevada allows up to 5,000$ of aftermarket parts that increase safety of a vehicle. Insurance companies themselves can and normally will inlcude the cost of your aftermarket parts if you have kept records and receipts from the part and install.

The biggest issue is that when people 'total' a car, they normally take the first amount the adjuster gives them. You can always show a adjuster proof that your vehicle is worth more.

If you need to know more, let me know and I can get specifics.