The 720S Track Pack is the second such model in the British manufacturer's current line-up. The McLaren 570S Track Pack is also on sale and accounts for one in ten 570Ss sold.
Weight in the 720S Track Pack is reduced by 24kg, aided on the exterior by a carbonfibre active rear spoiler, super-lightweight 10-spoke alloy wheels and a sports exhaust.
Inside, there are carbonfibre racing seats, six-point hardness and a telemetry system.
The Track Pack also adds a bespoke Track driving mode which gives the car the "sharpest" settings for suspension and powertrain control strategies, said McLaren.
Owners can analyse their track driving using the telemetry system. Using three video cameras built into the car and data-logging software, the system allows a driver to monitor performance and understand how they can improve. A range of real-time data is displayed – such as lap times, sector splits and driver comparisons – as well as video footage to spot missed apexes and premature or delayed braking points.
Performance on the 720S Track Pack remains unchanged over the standard model, so the 4.0-litre V8 engine propels the supercar from 0-124mph in 7.8sec.
The Proactive Chassis Control II active suspension and carbon-ceramic disc brakes also remain unchanged.
The Track Pack adds £28,360 to the price of the 720S, at £224,700. Customer deliveries will begin next year.