I loosened my Vband clamp at the xmanifold recently, thinking it would just slip off easily once the nut was backed off a ways, but the clamp stayed firmly in place. Are they are on there THAT tight or does removal of the Vband clamp come easier once the tension is taken out of the xsystem by say ..loosening/removing the rubber clamp where the exhaust turns to go under the sidesills? Thanks : )