What clearance do you have now? I mean how many centimeters is there between ground and the oil sump shield, and between ground and the muffler?
BTW, have you guys, and girls of course, noticed design o muffler. It's so bad... I mean if you are parking your car rear, and there is high kerb (curb) it is highly probable you will hit it with the muffler first... I know cause I did it just after bying a car. It should be more to the front hidden behind the left rear tire, or somehow lower in design so it would hid higher into suspension