Would 1.4" drop from H&R springs scrape on make a stock bodied r56 (non-S) with 17" crown spokes and oem tires scrape on parking garage ramps, such as the ones that are really steep and would appear to almost be at a 45 degree angle? The rubber flap thing under the bumper is okay to scrape, but it would it otherwise be ok?

Does anyone have first hand experience with similar ramps or live in a place with a lot of steep hills, like the Bay area?

 

I had them, scraped the black plastic lower bumper a bit, it looks fine as theres no paint to scrape off. Go for it.

 

scrape scrape scrape.. it's just the air dam and eventually youll have the same gap you had before :P

 

Yeah your gonna scrape that front lip. If you scrape real hard you could pull loose the clips on the bottom grill like in this pic.

Not a big deal you'll just need a set of needle nose pliers to pull it back flush again.

 

You'll hit your front lip if you pull to close to the parking space bump stops.

As far as inclines/declines goes you'll be fine as long as you don't drive straight at it... If you angle it you won't scrape the bottom fin/air deflector...

When you do scrape it's only the fin/air deflector...

 

You'll occasionally scrape the rubber air deflector like others have noted, even if you wear them out, they're CHEAP..
That being said, be carefull if you lower with the Alta cat-back, it's monster middle resonator hits/scrapes all the time when I'm entering parking garages.