Well, it's certainly been an eventful week hardcore, ultra-light British supercar reveals. Not wanting Aston Martin to hog the spotlight with the savage DBS Superleggera, McLaren has unveiled its new Sports Series range-topper: the 600LT. The fourth McLaren to get the Longtail treatment, the 600LT is based on the 570S and and is the fastest, most powerful and most track-focused Sports Series yet. Inspired by the McLaren 675LT and the iconic McLaren F1 GTR, the 600LT's modified carbon fiber body has been extended by 2.9 inches.

It also has an extended front splitter and rear diffuser, new side sills, and an aero-enhancing fixed rear wing to increase downforce. It may look similar to the car it's based on, but McLaren claims more than 23 percent of parts used on the 600LT are completely new compared to the 570S Coupe. Being a Longtail variant also means the 600LT has been put on a strict weight-saving diet. Thanks to its lightweight carbon fibre monocoque chassis and new carbon fibre bodywork, the 600LT is 211.6 pounds lighter than the 570S, bringing the dry weight down to just 2,749.2 pounds. To achieve this, however, you'll need to equip the 600LT with McLaren Special Operations' full range of lightweight add-ons.

These include a carbon fiber roof and cantrails and vented carbon fiber front fenders. Further distinguishing the 600LT are unique top-exit exhausts that "deliver a substantial weight saving and an incredible aural experience." Powering the 600LT is McLaren's twin-turbo 3.8-liter V8 engine, which has been upgraded to deliver 592 hp and 457 lb-ft of torque, up from 562 hp and 443 lb-ft from the 570S coupe. When equipped with every available lightweight component, the Sports Series achieves a power-to-weight ratio of 474 hp per ton. No performance figures have been released, but with more power and less weight the 600LT should easily improve on the 570S' 3.2-second 0-62 mph time and 204 top speed.

Traditionally, McLaren's Longtail models are produced in extremely limited numbers, and the 600LT will be no different. While McLaren hasn't specified exactly how many examples will be built, production will be "strictly limited" and only last around 12 months. For reference, the McLaren 675LT was limited to 500 examples of the coupe and a further 500 of the spider. Production of the McLaren 600LT will begin in October, with prices starting at £185,500 ($242,152), which includes a "Pure McLaren Road Owner Track Day" at a race circuit with tuition.