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From my experience vibration at certain speeds can be a hand full of things on these cars, very slight wheel bend, wires inside of the tires spreading (common after track days), unbalanced wheel & tires and alignment.
The one thing that has nearly fixed all of the above is road force balancing the wheels & tires. I had a very bad vibration from 100-115ish mph and had a local shop road force balance and "tire match" the machine told them where the tire and rim need to be for a perfect balance. I had a very unnoticeable bend on the front right rim. Overall I don't have any vibration!
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DME Stage III, Catless Downpipes, SSP Basket & Clutches, 3.5" Custom Intakes & Eisenmann Race Exhaust |