the crossmember is a chrome plated aftermarket custom piece that is part of Heffner's supercharger systems. Before I had the supercharger system, I removed the factory crossmember and polished it...turns out nice.
if you want to remove the stock piece, I jacked the car up a little on the front frame to remove the pressure to the brace. It unbolts pretty quickly but there is a piece that goes down towards the bottom of the car that you have to get to.....should take about 30 min. Send it out to be polished or chrome plated. Takes too long with sandpaper and mothers.