how could i make my truck louder but doing it the cheap way

im wanting to make my truck louder but right now i have a cherrybomb glasspack installed but i dont have it running out to the side or nothing its just sitting on the bottom of the bed.. im wanting something new or different where i can make my truck sound like a muscle car idk what to do idk if i could run straight pipes on it to make it sound like one or what [email protected] with any ideas you have