[insite]

John's right that the GT3 bar is a dramatic change. even on its softest setting, it's a LOT stiffer than the M030.

as for fittment, you need the GT3 bar & bushings, but you also need adjustable drop links; the stock links are too long. they're available from Tarrett or TRG. i also have a couple of sets if anyone needs some (i made extras).

the rear GT3 bar from the 996 will not fit the boxster. i've found that the H&R rear pairs nicely with the GT3 bar for a base boxster. for the S, use the rear M030 'Base' (not s) bar. the H&R rear is a bit too stiff for a boxster S; you'll have trouble putting the power down out of the corners (unless you have an LSD).