European M030 lowers the car 10 mm.
Would not recommend to change only springes, because all components work together. M030 springs and dampers are stiffer. M030 sway bars are thicker and the sway bar bushings are also "stiffer".
If you want an adjustable chassis, check out the Bilstein B16. There you can adjust dampers and ride height.
17" give a more comfortable ride, because the tyres are higher and a little smaller. 205/50/17 and 255/40/17 instead of 225/40/18 and 265/35/18. So the tyre itself can dampen more.
16" dimensions are 205/55/16 and 225/50/16 which work only on non S cars.
Last edited by Smallblock454; 02-17-2015 at 02:48 AM.
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