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      10-08-2014, 07:20 PM   #1
Gabe@TAG
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KW Height Adjustable Spring Kit M4 // Photos, Install and Impressions

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We recently received our first set of KW Height Adjustable Springs for our in house M4 code named "Black Betty".

To see the full history of this build click HERE

KW height adjustable springs kits are a great alternative to conventional springs. You don’t have to be satisfied with a fixed lowering as you can adjust the height with the KW height adjuster even after the kit has been installed. This works well for us since we like to swap wheels on our cars so frequently.

With these new height adjustable springs we expect the car have the ability to be lowered;

in mm:
Front: 15-30
Rear: 5-30

in inches:
Front: 0.6-1.2
Rear: 0.2-1.2

This will not only give us a more dynamic look but also the steering behavior and response of the standard dampers becomes more agile. All driver assistance systems and comfort features of an adaptive series suspension remain in tact which is a big selling point.


With conventional lowering springs you have to decide on the lowering from the beginning, but not with the KW height adjustable spring kits. Depending on the vehicle specific application you can change the lowering within the adjustment range with the threaded spring perch when the springs are already installed.


With the high quality finish as well as the KW height adjuster, the KW height adjustable spring kits delivery content always includes the vehicle-specific bump stops with dust protection system to protect your standard suspension against tear & wear caused by spray and salt.


Features of the KW Height Adjustable Spring Kit
- individual height adjustment of the standard suspension kit
- adaptive damper control remains active
- vehicle specific spring rates
- better steering behavior
- improved looks


Below is the unpacking followed by the install. Final ride height photo’s of the car to come soon!





























Here are the shots from the studio before they were installed. Everything is incredibly high quality and well built.























Initial Driving Impressions:

Our M4 is equipped with the Adaptive Suspension. In stock form there was a decent difference between all three settings but the “sport plus” mode was certainly firm. These new KW HAS are allowing us to keep the active dampers, and giving us the ride height adjustability that we are looking for. The ride in the normal “Sport” mode certainly firmed up from stock, but it really made the car feel much more stable, as it removed some of the bounciness the factory suspension had. The firmness is not uncomfortable though, in the short drive from San Diego to Newport Beach over the weekend, there was a few dips in teh highway that I know i have to prepare myself for (when i had the H&R Supersport Springs on), and in the KW’s still were more harsh, but it was a much sportier feel.

Overall, the ride is MUCH better than going with just standard springs. The ONE negative side we noticed, Being that we ran our 20x10 HRE P104’s up front, the new larger spring perch did not allow us to lower the car down to H&R Supersport Spring Level’s. The clearance between a 20x10 Front Wheel’s, combined with the 265/30/20 Pirelli Tires up front allowed us only to go about .75” lower than stock. For those that are interested in doing these springs and getting a significant drop, we recommend a 9.5” wide wheel up front with a lower offset.

















Last edited by Gabe@TAG; 10-09-2015 at 07:36 PM..
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      10-08-2014, 07:26 PM   #2
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Was the diameter on the KW front spring the same as OEM? Smaller? Larger?
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      10-08-2014, 09:15 PM   #3
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I really like the simplicity of these units, ride height adjustment in conjunction with stiffer springs is critical in setting up the attitude of the vehicle. Have you guys measured the spring rates by any chance?
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      10-09-2014, 02:04 PM   #4
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Quote:
Originally Posted by RSXDC5 View Post
Was the diameter on the KW front spring the same as OEM? Smaller? Larger?
Can you please answer this? Thanks!
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      10-09-2014, 02:22 PM   #5
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PM'd everyone above. Give me a min and ill check the diameter
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      10-09-2014, 04:29 PM   #6
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Interested in all of the details and pics as well.
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      10-13-2014, 02:29 PM   #7
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KW

Hey guys, We have a shipment of three setsof KW's coming in this week! PM me to put your name on them. No word of when the next batch will arrive.
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      10-13-2014, 06:18 PM   #8
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Really looking forward to these being available for the F83
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      10-16-2014, 02:58 PM   #9
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How is the stock strut spring perch removed and replaced with KW's threaded perches? And what's the purpose of the rear helper spring?
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      10-16-2014, 03:19 PM   #10
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I like that it can be 15mm lower front and 5mm rear, want to make this for my car for the next spring. But it's a pity that I can't get the springs separately without the adjuster. I need to pay double price to have those springs in the highest position...
But if there will be camber plates for this system it will be cool to lower 30mm all around and make the negative front camber before the track day.
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      10-17-2014, 04:34 PM   #11
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What is the size of tire and wheel in the rear?
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      10-17-2014, 08:12 PM   #12
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      10-17-2014, 09:36 PM   #13
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Why would u wanna go lower? That drop is PERFECTION
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      10-19-2014, 11:47 AM   #14
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This is exactly the thread I was waiting for. And this is exactly the results I hoped for. I will now be purchasing these.

Just to confirm: with adaptive suspension from the factory AND the HAS KW kit, you can still use the 3 suspension settings in the car and still notice SOMEWHAT of a difference??

The pictures have THE PERFECT drop. I wanted to eliminate that awful wheel gap but not have that slammed look.

Thank you very much for the post and review!

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      10-19-2014, 11:48 AM   #15
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What is the price?
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      10-19-2014, 12:25 PM   #16
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do these fit F30's? (msport not adaptive suspension).
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      10-19-2014, 01:20 PM   #17
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Super trick.
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      10-19-2014, 01:44 PM   #18
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Do they make these for F30 ?!
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      10-19-2014, 03:48 PM   #19
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      10-19-2014, 04:28 PM   #20
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Is comfort mode the same?
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      10-19-2014, 04:30 PM   #21
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      10-19-2014, 06:41 PM   #22
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I'm not sure why you're PM'ing everyone when other members (myself included) would like to know the answers to all of the questions asked by others.
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