Quote:
Originally Posted by tomm.brz
maybe you have a small leak near catback or front pipe that exacerbates this
but it's kinda normal
when cold start is on, car has retarded timing, and stratified injection with lean burning
it just sounds different and some leaky gasket make it more evident because of the very retarded timing
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I've replaced the headers gaskets recently (the original ones did not look good) and it made no difference in the noise.
The noise is louder on the right side of the car (left side of the engine).
It just sounds like pressurized air escaping from somewhere it's not suppose to...