I have a Redline Track model on order for next month. I am doing a remodel on my house that will change the garage completely, but for the next year or so I will need to use the existing driveway.
Today I had the entrance modified and now my 02 BMW 330 Sport Package sedan clears the entrance hump by one inch or less. Will I be able to get in with the Z ? If it is necessary I can probably lower the hump anther inch, but it will get messy!

 

4.7" but thats likely between the wheels at the diff. so your actual clearance for a bump might be a bit higher.

its not too bad tho. Ive never bottomed out on a speed bump, tho my dad has he really has no care about how fast he goes over them, with caution tho, Ive never touched. and Ive take some mean lookin bumps.