Almost 100 kilograms lighter than the 570S on which it’s based, the 600LT will be a one-year-only affair considering that McLaren Automotive will take the veils off the 600LT Spider during the course of 2019. There’s no limit on how many examples of the breed will be manufactured in Woking during this period, but then again, those who order the 600LT will enter an extremely exclusive club.
Ignoring the endless possibilities for customization offered by the McLaren Special Operations, the most expensive option available for the 600LT is the MSO Clubsport Pro Pack. Adding £28,480 to the price, this package includes Senna-inspired Super Lightweight Carbon Fiber Racing Seats, more carbon fiber for the interior, titanium wheel bolts, MSO Defined LT carbon fiber roof, cantrails, and front fender louvers, MSO Defined harness bar, and the six-point harness system.
To understand how serious McLaren is with the 600LT when equipped with the MSO Clubsport Pro Pack, the customer can’t have it and the Luxury Pack together because the latter would spoil the weight savings brought by the former. At 1,247 kilograms (2,749 pounds) in its lightest configuration, the 600LT is the lightest Sports Series model to date. The Senna, by comparison, comes in at 1,198 kilograms (2,641 pounds).
Source : https://www.autoevolution.com/news/2019-mclaren-600lt-shoots-flames-from-exhaust-at-goodwood-festival-of-speed-127134.html