I dont know as I havent removed the existing one yet, but my guess is alot due to no second piece of glass. I can tell you the V8 one is fairly light, I cant wait to swap it. I am working very slow as I broke my wrist in a motorcycle accident in early May and have to wait til a couple buddies are over again to help with the swap. I can still paint pretty well though and moving the decklid in pieces to paint it is fairly easy. That decklid is an odd shape to paint, I removed the grills, window cover, and wing.