Long story short… N20 backfire took out the intake manifold and fuel rails at a very high speed. Driver thought the bottom end let loose… Didn’t smell much at 150+mph. Rather than shut it down and have to stop with no brakes or power steering he coasted it to a stop. By the time it came to rest the open fuel and n2o lines had a huge blaze going. Took the FD 18mins to show up and put it out. The rest is history…