Hey,

I notice this air chattering sound at low revs, but it tends to dissappear as the revs build up. I only noticed this after having my headers installed (X force 4>2>1 equal length). All gaskets were replaced except the dump pipe one when they were put on so i dont think it will be any of those gaskets. I also smell exhaust fumes from above the turbo area, smells the same as the fumes you get from the muffler.

Im thinking its one of the slip joints leading to the up pipe section, but if it was you would think that the sound would get worse and louder at high revs, yeah? The other slip joints on the manifold are where the crossover pipe would be, but i cant smell any fumes from around there. The car still goes hard, and if anything, harder with the headers on but this sound is just annoying.

Any ideas on what it could be? Normal?

Any help would be much appreciated.

Cheers
-Nick

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"Wrong fitment".