thanks bruce, i'm gonna have a look under the car tomorrow. i already have the bushing kit and i've experienced the shimmy... although it's only present between 55 and 60mph, and quite violent at that... almost as if there is a severe tire imbalance. But the tires are fine, as my steelies and snows were just balanced. i'm a little worried about the exhaust issue, though.

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100 km/h is unsafe... it's fast enough
to kill you, but slow enough to make
you feel safe.