hey i have a cherry bomb glass pack and i would like to put it on my jimmy..but i was told i cant.. reason being im not sure whats its called but its 2 inch before the muffler its like a Triangle shap and he said there a gasket or sumthing is side of it and would not be a good idea to cut/take it off. he said in order to put it on i have to put a whole new muffler system in ..is this true ?? plz help