McLaren 720S GT3X launched as 710bhp track-only special

The McLaren 720S GT3X lifts restrictions on the standard GT3 racer, giving buyers more performance to play with

Since its debut in 2019, McLaren’s 720S GT3 has been actively competing at the top level of global GT3 racing, yet keen to push its high-stakes racer to the extreme, McLaren has revealed this new 720S GT3X, a restriction-free interpretation of its GT3 racer. 

The GT3X is a track-only customer car in the same vein as Lamborghini’s SCV12 and the extreme GMA T.50s. Free of the FIA’s strict GT3 regulations, McLaren’s engineers been let off the leash, giving it a significant power boost over the race car.

> Hennessey tunes McLaren 765LT to 1000bhp – more than P1 hypercar

Using a handbuilt, derestricted version of the GT3’s M840T 4-litre twin-turbocharged V8, the GT3X now boasts an output of 710bhp, or 740bhp with push-to-pass. The extra power is created with the use of larger turbos, larger manifolds, blueprinted cylinder heads and an overhauled cooling system, which together produce 200bhp more than the racer for a power-to-weight ratio of around 550bhp/ton.

Ian Morgan, Director of Motorsport for McLaren Automotive, said: '...we've already got a very good GT3-based car, we wanted to make it faster, so more power, more acceleration, better braking and overall lap times considerably faster than GT3.'

Underpinned by the same MonoCage II carbonfibre chassis as both the road car and 720S GT3, the GT3X features the same aerodynamic package as the racer with front dive planes and that large rear wing helping producing extreme levels of downforce. Finely tuned to optimise aero performance is the suspension setup, also adopting the dampers, spring and anti-roll bar combination of the 720S GT3.

Given its origins the cabin is predictably bare, but unlike the racer, McLaren has modified the roll cage installation to allow for a passenger seat.

Pricing hasn’t been announced, but for context the standard GT3 model costs from £440,000, a figure we suspect will be built upon with the GT3X.

Recommended

McLaren 765LT Spider 2022 review – not just a drop-top 765LT, but a better 765LT
McLaren 765LT Spider – flames
McLaren 720S

McLaren 765LT Spider 2022 review – not just a drop-top 765LT, but a better 765LT

The new 765LT Spider absolutely delivers by refining the Coupe’s intense capability, creating the ultimate open-top experience
3 Dec 2021
McLaren 720S GT3X 2021 review – a Ferrari FXX-K for less or 720S GT3 racer for more?
McLaren 720S GT3X 2021 – low light front cornering
McLaren 720S

McLaren 720S GT3X 2021 review – a Ferrari FXX-K for less or 720S GT3 racer for more?

McLaren’s 720S GT3X might struggle to make much sense financially, but it’s like almost nothing else when you unleash its full potential
3 Nov 2021

Most Popular

McMurtry Spéirling fan car claims Goodwood FoS hillclimb record
McMurtry Spéirling
Electric cars

McMurtry Spéirling fan car claims Goodwood FoS hillclimb record

The McMurtry Spéirling has dethroned the Volkswagen ID R as the fastest car to complete Goodwood hillclimb
26 Jun 2022
BMW M 50th Anniversary special previewed for the first time
BMW M 50th
BMW M4 coupe

BMW M 50th Anniversary special previewed for the first time

Think BMW M’s M3 Touring, M2 and XM were enough to celebrate the big 50? Think again…
27 Jun 2022
‘It was as if Jesus himself had blessed Porsche with a new suspension system’
Jethro opinion header
Porsche

‘It was as if Jesus himself had blessed Porsche with a new suspension system’

The deifying of Porsche has left Jethro with a worrying affliction – Porsche fatigue
28 Jun 2022