depending on how low your car is, the discrete tailpipes can get very annoying.
I found on mine, many many years ago, at standard height the discrete miltek system was fine, but when lowered 50mm, it became REALLY boomy. It's because the downturned tail pipes were closer to the ground and it just made it really horrid on motorway driving.
I cut the downturned tips off, and welded straight pipes on, and it sounded better, and no more motorway drone.