Quote:
Originally Posted by Carl.O
There is no leaks from the exhaust.
I've might missunderstood what drone is. I belived that was a more high frequent sound.
Unles there is a easy solution to fix this i wil put the Stock back on as i use the car evry day. too bad since the sound over 3k was Nice
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"Drone" is caused by exhaust valve harmonics. The thinner the metal on the headers the louder the drone. It's why your stock headers are so bulky and thick they help mask the drone and it happens the loudest in exactly the rpm range you are stating.
Mena
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