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Moving sideways?
So, my son has a 2008 135i. We did VRSF downpipes and intercooler, and he dropped a tune on, stage 2+ I think. Holy cow.
This thing pulls like a freight train, but I also noticed an instability - it feels like as the boost comes on, the car is shimmying sideways.
I suspect it's revealing some wear in the control arm bushings or similar.
Any thoughts?
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