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      03-20-2024, 09:44 PM   #8
HP Autosport
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

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Quote:
Originally Posted by danix View Post
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?
Bushing deflection. You will likely need solid subframe bushings and spherical end toe arms to keep that rear button down.

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