Most likely the same Ecoboost V6 that is powering Ganassi’s current Daytona Prototype Car. Proven endurance powerplant that already won the Daytona 24 hours this year.

First off, Lexus is part of Toyota...not Honda.

I’m curious to know whose engine they are using. Its crazy expensive to design, manufacture and certify an engine from the ground up. Are they procuring the V10’s from Audi (R8), Porsche (old Carrera GT) or Yamaha (LFA)?