when my exhaust is cold it makes a slappy/raspy/tinny sound @ around 3500-4000RPM but when it is warmed up it sounds ok. car is an ae101 trueno and has been to magoos and they havent found anything wrong with it??
sorry forgot 2 mention that it has a big bore exhaust on it, 2 resonators and a dytech muffler. it has also only just started doing this it never used to before........
i have only noticed it while accelerating, if that is what u mean, but i havent tried sitting on those revs or doing it while not moving, the more boot u give it the louder and more raspy the noise is.....