I currently have some chrome 20 inch Shelby Razors on my 12 GT500. It came with the stock wheels also and I may put those back on. Anyone happen to know how they compare weight wise? I guess in my head I see a set of staggered 20 inch wheels with 275 front and 305 on the rear and think they weigh a ton compared to the stock SVTPP wheels.. or is it really a lot closer than I think?