Boxster Euro Suspension Kit (ROW M030):Porsche Parts & Porsche Accessories - Wholesale Porsche Parts & Tequipment
you might be able to simulate it with bilstein 'sport' shocks, lowering springs (H&R? Eibach?) and softer aftermarket swaybars (ie, not H&R) such as what tarett sells. the m030 package would be less expensive, however.