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I have them on my 2006 997 C2S. Cannot notice any difference in handling on street. Maybe a very slight improvement on our high speed track. The 996 may handle different. Definitely adds to the cool aggressive factor.

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'04 C2, question is outside of moving the wheels further out, are there any handling improvements?Is 7 mm front and 14mm rear correct for my car? Thx for replies.

I think any change in the car's handling characteristics resulting from spacers is more perception than reality. Most people use them simply to get "the look".

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Widening your track is a basic competition change made to many cars when raced. A wider track will lower the roll center therefore reducing understeer.

A wider track will also reduce the load transfer to the 'outside' tire which will reduce the loss of grip from the 'inside' tire. Look at the history of Porsche base models to their evolved cousins... 924 > 944, Carrera > GT3RS, etc. Now unless you are tracking the car you probably wont notice the difference. However if you are tracking (or racing) the car, every incremental step toward an optimum setup is a step worth taking.
Edited by apex944
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Widening your track is a basic competition change made to many cars when raced. A wider track will lower the roll center therefore reducing understeer.

A wider track will also reduce the load transfer to the 'outside' tire which will reduce the loss of grip from the 'inside' tire. Look at the history of Porsche base models to their evolved cousins... 924 > 944, Carrera > GT3RS, etc. Now unless you are tracking the car you probably wont notice the difference. However if you are tracking (or racing) the car, every incremental step toward an optimum setup is a step worth taking.

Until I see comparative same day track lap times before and after on a properly setup car, driven by a known competent driver, I will continue to say they are for looks more than performance......................

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I did not bother to get an alignment after I installed my spacers in early 2010. I have driven the car over 50k miles with them and have never had uneven wear, and I do not putt-putt around the local village. My fronts now have 30k miles and my rears 15k with life still left all around.

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