most people don't know but the exhaust tip is a major cause of the sound of the exhaust system...a 4" tip is loud b/c of the echo created...smaller the tip the quieter it gets...i went from a 4.5" tip to a 2.5" tip and it made a huge difference in sound...it actually sounds more aggressive than buzzy...only cost me $50 for the tip (includin cutting and welding the new one on)