Since i installed my top speed headers almost two years ago i´ve had issues with the exhaust sound. It was boomy and very noisy then with the stock exhaust and it´s the same now with the Tubi non valved dual muffler exhaust. The car does not sound like a Ferrari on low revs and has a motor boat like sound. A bit like a boxer engine. It sounds better on higher RPM:s but it doesn´t matter when you don´t drive around on high RPM:s all the time. I´ve had several negative comments about the sound and I get a headache from the drone. I get the impression that top speed headers sound different compared to other brands who provide 4-1 headers? I heard some cars on youtube with top speed headers and s-line exhaust and I hear that boxer/American V8 noise on low rev in their cars also. My friend has a full IPE exhaust with 4-1 headers but his car is quiet compared to mine even with the valves fully open. His also doesn´t drone. Any suggestion to how to remedy this, will Tubi and Capristo headers with 4-2-1 style sound different? Also I would like to hear others chime in with their experience of the 4-1 headers or top speed headers and sound.