For sale C-4 x frame brace..Mid America item #612-577..current cost
$399.but.currently not available due to high demand..but you can have mine
like new with all hardware for $200 plus $20 shipping...will be listing it
on ebay in a couple of days....sold my C-4 Vette...stops the
shake..!!!!!!!!!!!! It really works..Big difference when the top is
off...very solid ride.