that's the oil fill tube. it'll leak a bit of oil when throwing the car around, but you'll usually smell it as the oil gets onto the engine and burns off. any addnl vibration since the new dmfw was installed - could an unbalanced situation cause seepage past the rms? i'll get a weep at the rms when at the track and running the car consistently at/near redline (presume more vibration at this rpm).
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