I bought a magnaflow muffler the other day and had an exhaust shop to put it on for me. The muffler is 2.5 dual/dual. It has a built in x pipe in it. the reason i bought it was to get a little bit of performance and let it flow. This is my first suv, i have always had trucks or cars. The muffler is a lot louder then the magnaflows i have had on previous vehicles. My question is can i just put a glasspack/resonator in. Will that be noticeable quieter or not. Thanks for the imput