Suspension mods to 996

[JT71]

I've got a few track days booked over the coming months for my 996 (3.4), and having just upgraded the brake pads to carbon metallic, feel like the suspension could do with firming up as the car feels slightly unsettled on a track. I've been told that Porsche do two different extremes of upgrade, the M030 which is fitted to the C4S and Turbo, and another more extreme version fitted to the GT3 (not sure what the code is?) - any advice what would be a good choice? I'd also like to lower the ride height as well as it seems to sit slightly high. Although I do drive it every day, I'm not overly concerned about comfort, more interested in performance!

Any other suggested track upgrades would be appreciated, Cheers!