I just got my car back from having the "Tick TSB" performed. While they had the motor out I gave them a set of JBA shorties to install. They were able to use the stock exhaust manifold studs on the passenger side and were able to use all but three of the studs for the drivers side. I also had them use the stock OEM gaskets. I don't know if it's just my imagination or if I'm just not used to the new sound of tubular headers, but I want to make sure I don't have an exhaust leak. I can't hear anything obvious when the car is at idle or under part throttle cruising. I do hear something under WOT, but I'm not sure if it's a leak or not. Is there any definitive way to prove or disprove whether you have an exhaust leak?