im new here, my GXP has aftermarket mufflers welded to the stock tips, i dont know if they are name brand or not, I didnt see a name on them, i think they are just cheap knockoffs, one rattles slightly on low rpm accel, looking to add a trans cooler asap, maybe a DIY intake or at least a KN filter (I HATE those stock airboxes though), and some Mobil 1 oil and thats it, dont wana do too much, i drive a lot so I only want to mod what will increase MPG's or extended life of the engine/trans, mainly the trans, these motors are bulletproof and are easy to work on
