As far as the difference between the standard suspension and the M030, the M030 has stiffer springs, struts, and sway bars than the stock suspension. The cars also rode a tad lower, but not much, not even an inch I believe. It was an option at the factory in '97 and '98, and you could get it as part of the P38 Sport Technik package which also came with the 17" wheels. I don't believe Porsche made it available any other year. Don't know much about the ROW30 tho.....
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1998 Guards Red Black/Black 5 sp.
Work done '06 :Replaced bad hose and clamps from reservoir tank
oil change and filter
replaced seals on both cam covers
brakes bled and refilled
Replaced bent rear right lower control arm
Front air dams and 3 underbody panels replaced
Halogen headlamps replaced
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