Well before I go to a stock system I put my super turbo,s I had hanging around onto this car ,just to see what difference they make.It is definatly quieter all round with a real low bass soft sound now,but the resonance is still there at a wider Rpm range now 2200 to 2600 .Mind you it is a quieter muffled resonance sound.I think I will drive it like this for awhile and see how the sound changes as the packing in the turbo,s moves around a bit and gets wet from condesation.
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