Perfect fit even over Stage 3 aero kit and canards. Still had enough elasticity. I had my doubts and was ready to buy extensions but decided to install them to see how long the extensions should be. To my surprise, they are not needed. My only suggestion is if you wear this product on ducks, make sure you put something on the rim of the ducks to prevent the friction caused by the wind from chafing and cutting through the bra. As for my work, I will check it out on my upcoming 8 hour trip. But I believe in the product. The only reason I got it was because I saw a Corvette guy on YouTube saying he buys this for all his customers. I've seen some bad reviews about installing aero kitsch, and one said it couldn't be installed over winglets. I assume the company updated the product because it was a great fit! Highly recommended! 8 hours drive and it held up great and worked as advertised. MUST BE!