Installed H&R lowering springs 29378.1
 

I installed the H&R lowering springs 29378.1. It's for air ride rear suspension only and consists of 2 springs for lowering the front and 2 links for lowering air ride suspension on the rear. My problem is that those two links are supposed to be adjusted to 65mm in length per H&R instructions manual. I also called them to confirm. But that makes the links longer than the factory ones. Rear ride height is now at 29 1/2 (749mm).

Does anyone have these installed on their single-axle air spring sports suspension? What is your rear ride height? Should I just adjust the links to make them short or install back the factory ones? The factory ones are shorter than the H&R links even when shortened to max.

Ok, I was able to bring the rears down to 715mm via DIS. Fronts are at 708mm. Looks good:thumbup: Pics to follow soon.

Factory settings for a 4.8is are 707f and 709r (w 20 inch rims), surprised that your 4.4 was that high to start with.

Looking forward to seeing pics

Not much of a drop -25mm rear 30mm front - which was exactly what I wanted.

Looks good. Very minor drop, but it is noticeable.

Side question; do you have any problems with jacks or jack stands on that flooring you have in the garage? Need to do something about our bare concrete...

Yeah, I'm happy with the drop- I didn't want it to drop too low to look like my E39 :D. No problems with jacks. As for jack stands, I place them on an extra piece of the same flooring cover to protect the flooring from marks. The sharp edges of jack stands will leave marks when the vehicle is kept up for days on end. The flooring itself will hold up semi-tracks or any vehicle in excess of 80,000 pounds. It's made by an all American company called snaplock. Check out their products at snaplock.com. Installation is easy requiring no tools and it's a DIY thing.

If you want something that is easy to clean and very durable: https://www.amazon.com/Rust-Oleum-25...70_&dpSrc=srch

It's what I put in my garage. Easy to do and easy to keep clean.

I have the H&R kit installed. I purchased links that can be adjustable to drop the rear more than the H&R links allowed. It was years ago and don't remember the source. Only issue I have had is if I jack it up until the rear wheels are off the ground the links allow the arms to go the wrong direction over center when I drop it back down. Spacers will also help fill the wheel wells some more if that is what you are after.

Yikes. $3.69/sqft is out of my budget. Especially for a house that will be a rental property in a few years. :) I'll have to go with an epoxy like you did fifty.

Looks like the suspension has settled and I also shortened the links further. Front now measures at 702mm and rear 704mm, measured when vehicle is 100% level on a lift. Now, asked the alignment shop if the height change will have any impact on alignment. They said yes, height adjustment affects alignment geometry and needs to be redone. I gave them an askance look. What is the experience of you guys?

X5only, in my experience anything that I have ever lowered has usually had to have the camber adjusted, depending of course on how dramatic the change was. I would at least have it checked, it's way cheaper than tires :-)

Yes, lowering changes the alignment. With the H&R kit you should be able to have it aligned within specs. That assumes the rest of the suspension is in good shape. You should be able to see the increase in negative camber (top of the wheel tips in). The changes in toe and camber will increase tire wear significantly.

Yes, I already had the suspension aligned after H&R kit install and a complete suspension overhaul. And then I recently lowered the rear a little bit by shortening the H&R adjustable links. Lowered it by about 10mm. The alignment shop that did the initial alignemnt thinks the suspension needs to be re-aligned again due to this drop. The first alignment was done about a month ago.

Any change impacts the alignment. 10mm is not much but due to how much out of alignment can impact tire wear I would certainly have it checked to see if it is still in spec.