The Longtail name carries a lot of cachet in McLaren circles. There was the legendary F1 GTR Longtail, the 675LT, and it looks like Woking is working on a 570LT, too. But this latest comes from an outside party.

Lanzante Motorsport released this teaser image on Instagram, showing what it’s referring to as the McLaren P1 GT Longtail. It’s ostensibly a more extreme version of the P1 hybrid hypercar, though details at this point remain sketchy at best, and we haven’t even glimpsed at the back end where the Longtail modifications will be most apparent.

For those unfamiliar, Lanzante is the British constructor that helped McLaren win the 24 Hours of Le Mans in 1995 with the F1 GTR. It’s worked on a number of projects in the decades since, but most recently returned to the fore by modifying the track-bound P1 GTR to road-going LM spec.

This P1 GT Longtail has reportedly been commissioned by an independent customer. As we can see, it has more vents in the fenders and what appears to be an even more aggressive aero package. And that shade of green appears to mimic that of the 1997 McLaren F1 GT, a road-going version of the Longtail – specifically the XP prototype still owned by the factory, with the other two held by private owners.

Could one of them be behind this project? Possibly. But whoever it’s for, we’re looking forward to seeing it shape up. Because even with the new Senna promising more raw performance, Lanzante is here to show us that the P1 could still have a trick or two up its proverbial sleeves.

https://www.instagram.com/p/Bj1f-TWhEDd/?taken-by=the_real_lanzante