You must have seen a Lamborghini, Ferrari or Mclaren that is modded with several parts from the original version. These parts are included in a package. It is the company called Novitec Group that is selling the modifications to five luxury cars.
I have seen one Lamborghini Aventador Novitec Torado and one Ferrari 458 Speciale Novitec Rosso. The only thing I remember is that I needed to cover my ears after the first ROAR from the exhaust system. The two cars really show the differences between Novitec mods and without.
Let us see some pictures of the different car brands with the novitec mods.