[PeteKz]

Lots of discussions on this in parallel threads. Take a look at those. Bill V has posted many charts of what different size t-bars and sway bars do to oversteer/understeer.

You already have some significant changes with the Rebel bushings and KW shocks. I suggest that you change the T-bars first, then see how it handles, then add or change the sway bars. For T-bar size, my experience with my car (see below) suggests that you use either 20/26 or 21/27 bars. 20/26 will give a little more compliant ride than 21/27, but a little more lean in corners. HOWEVER, the shock settings will make much more difference in ride than the T-bars, so be sure to experiment with those settings.

Alignment: DOn't over look this. For spirited street driving, you should start about -1 degree camber at the front and rear, then adjust from there depending on your preferences. Corner balancing is important too.

Ride height: Bill also has posted diagrams of the front McPherson strut geometry, and explained why you don't want to lower the car too much. Your car, like mine, sits pretty high visually, even at the lower end of the Porsche specs. However with the KW struts with raised spindles, the front of yours should be lower by the amount of the raise and have a noticeable forward rake down.

Do you have a 19mm spindle raised? How does that work with your 6x15 wheels?