Easily busted if you pay attention. When he walks around the right rear of the truck to lean down so you can see the muffler the sound gets drowned out and hollow sounding because the sound is coming from the other side of the truck and now resonating through the bed of his truck. As loud as the vehicle making the sound was standing outside the truck it would have blown you away when he got under it. I bet his dad has a cammed vette and it's parked inside the garage in front of his truck.
2005 Silverado SS AWD
AEM CAI, ARH LTs, HD-2 shift kit with vette servo, Circle D 278mm 3200 stall Madtunesracing.com street tune (MTR now has a Dynojet 248 chassis dyno)
13.82 @ 94.92 w/1.83 60'