A Whole Set of Exhaust System. Connect the stock muffler or our modified muffler.We are not responsible for your custom duty, thank you! All link pipes in our shop are only suitable for the original front pipe. Once the original front pipe has been modified, our link pipe will not be applicable. If the DB killer can be installed in the middle pipe, it is recommended not to install it in the muffler. Please keep the items clean with no flavor, or we won't accept the return.