It should not void the warranty becuase you can't tell the difference between a FTVB and a Stock VB just by looking at them. It is a simple bolt on that takes about 2 hrs from start to finish. It is very easy to do and worth every penny.
If you are patient a used one will pop up forsale every now and then. Or you can pay the $200 from a vendor.
If you are patient a used one will pop up forsale every now and then. Or you can pay the $200 from a vendor.