I have a stock 2001 Boxster S with 18-inch Cayman S wheels and Michelin Pilot PS 4 tires. I'm looking at installing the rear M030 19mm sway bar cause I feel the car would benefit from dialing in more rear roll stiffness. A bit too soggy back there. I'm not racing, just looking for a little more rotation and fun! Has anyone done this, and what is the Porsche part number. Thanks!