Hey guys, welcome to Supercars of London and here we have the Porsche Cayman S with Army Tricks Exhaust system and the new RAPT Audi R8 from Supercars of London and we're about to do a rev battle and use this decibel meter to try and find out which one is the loudest. You've seen some videos here of us going through the tunnel and also my ride in the car and how crazy that is. So now we're going to find out which is the loudest car. Which one do you think comment below and we've got some Army Tricks plates as well from SB Racing Giro which is pretty cool and now it's time to start the Porsche Cayman S up. This has Army Tricks Cat-Back system sports cats and Manifold's in head and straight from Army Tricks so let's start this up and see what it reads. Yeah do quiet.