You have 2 exhaust manifolds (one on each side of the motor). Those come down from the motor and connect to your midpipe (stock is an "H" design, but imagine an "X" in this instance). The crossover happens where the 2 sides of the exhaust come together. Then it splits back apart and continues down the car toward the rear. Your mufflers are located just before the rear axle, then the pipes are bent up and over the rear axle and then they come back down and exit out the rear of the car.
Just get under your car and look.