After I put my 280ce back on the road recently I had to remove all the stock mufflers. I then put a dial-in dual out chambered muffler in the front area where the first muffler was and I put a dual-in, dual-out at the back of the car. The muffler at the back is a x-crossover style. I purposely built it like this because I wanted it to have good Racey tone and it does. Probably not the best for a daily driver though, it has a little bit of a drone when cruising at around 60mph. Hope this helps.