YouTuber attempted the impossible and built a $2.5 million McLaren P1 from scratch in his workshop. The only one ever built outside the factory

YouTuber Tavarish has done what many thought was impossible: he successfully built a $2.5 million McLaren P1 entirely from scratch in his workshop. This makes it the first and only P1 ever built outside of McLaren’s own factory.

According to Supercar Blondie, the project started with a bare carbon fiber tub, a collection of spare parts, and components taken from a donor McLaren 12C. Tavarish’s original plan was to have the hypercar ready for display at the SEMA trade show in just seven days. For context, McLaren’s factory takes around 800 hours and over 100 people to build one of these cars.

Tavarish and his team, the Car Council, were working out of a workshop in Denver. Aftermarket parts rarely work directly with OEM McLaren components, so the team had to constantly adapt and fabricate. Team member Freddie even had loaner parts from his own P1 shipped from Florida almost daily.

Building the McLaren P1 outside the factory turned into a grueling five-month marathon

By day three, the challenges were piling up. Intercooler lines didn’t line up, fittings refused to fit, and suspension parts needed major modifications. Despite this, the team kept pushing forward, staying late to work on the doors, wiring, and dashboard.

Day four marked a major milestone for the team. The M838TQ engine, which had been meticulously built over a year earlier at Cannonball, finally slid into place. The breakthrough came after the team tracked down a missing transmission bolt from the donor car, a small but critical piece that had been holding up the installation. With the engine finally seated, the project moved into a new phase, bringing the team one step closer to bringing the car back to life.

By day five, the car was starting to look like a real P1 again, and the team managed to put power to the car for the first time. In the world of entertainment, a musician demanding their music pulled from a project shows how passionately creators protect their work – a sentiment Tavarish clearly shares about this build.

However, the seven-day goal for SEMA turned out to be too tight. When the car arrived at the show, it was presented as a “rolling shell” – complete on the outside but not yet mechanically functional. 

Tavarish admitted, “I have to be honest with myself. I may have overestimated the scope of the build.” He explained that what began as a “7-day sprint turned into a 5-month wrenching marathon that tested me in ways I didn’t know existed,” during which he flew between his home and the Denver workshop six times.Work on the car didn’t stop after SEMA. The team focused on pressurizing the suspension system, which it passed with flying colors. 

According to Cannonball Garage, team member Arne even drove more than 1,000 miles from Chicago to personally deliver a McLaren factory hydraulic bleed machine, ensuring the team had the right tools for the job. By the eighth day, the team was elated, announcing that they finally had “a roller!!!” The car was now fully functional and ready to make its grand return to SEMA for the full reveal

After SEMA, the final work continued. On day ten, the team bled the brakes and found the cause of a battery issue, which was a key breakthrough. Then, on day eleven, the news everyone had been waiting for finally came – the P1 engine officially turned over. Ivan, the CSO lead and Cannonball Garage technician, was specifically praised for his leadership throughout the project. 

Much like the controversy surrounding Nolan’s latest casting decisions, bold creative choices don’t always go unquestioned. From a bare carbon tub and a shipping container full of parts, the team built a fully functioning $2.5 million McLaren P1 – the only one ever assembled outside of McLaren’s factory.