759HP, $515,000 Lamborghini Aventador SVJ - 0-6 in 2.8 Seconds!

While cruising through the new downtown Lenexa area, I happened upon a string of exotic sports cars all parked in a line. So I stopped to take a few photos. Another guy was there named Shube that I talked to for a bit. Then moments later a few of the owners came out of the cafe there to leave. I was able to capture this Laborghini taking off. He hammered it for sure! I’m not sure what to make of all the backfiring. Is that supposed to be normal, or has the V13 engine been tampered with?