Best way to remove that front wheel gap?

[Maitre_Absolut]

The CS is not immune to the front wheel gap. Seems even worse since the back fender is flush to the wheels.

Anyone know the spring rates on the CS and of the aftermarket alternatives or the M performance HAS?

My first instinct is to go MP HAS to preserve warranty. Its still double the double the price of KW HAS though, which is then triple the price of springs. I've seen some do only a front spring swap, that seems like the simplest choice though only if rates would be close to CS stock.

MP HAS installed is 4k at my dealer which seems like overkill to fix a minor front end height problem (ideally 0.75" lower would be great).

[darielsantana]

Take the KW HAS

[reprod]

You don't want to screw up the dynamics of the CS. I would recommend only MP HAS or Dinan HAS.

Don't cheap out on suspension. It substantially affects the driving characteristics of your vehicle.

[ROBERT1183]

Definitely recommend the Kw has kit. I just had it installed on my 18 competition. It rides better than stock. I just wanted to sit top tire and get rid of the wheel gap. Very happy with the purchase

[Tall Tom Cruise]

Originally Posted by ROBERT1183

Definitely recommend the Kw has kit. I just had it installed on my 18 competition. It rides better than stock. I just wanted to sit top tire and get rid of the wheel gap. Very happy with the purchase

Looks great. Could you tell me what size spacers F & R you're running?

I just picked up a KW HAS kit for my '18 M4 zcp. I was thinking 12mm spacers up front and 15mm in the rear after its dropped.

[e90-4aj]

also recommend KW HAS

[Justin.AutoTalent]

KW HAS is the same as M Performance, the M Performance is just rebranded and has suspension coding to adjust/compensate for the spring rates.

The KW HAS is half the cost of the M Performance, however the best option is still going to be a coil over system.

If you want to retain the EDC, KW offers a plug and play kit called the DDC (Dynamic Damper Control)

[FatRear08]

Originally Posted by Justin.AutoTalent

KW HAS is the same as M Performance, the M Performance is just rebranded and has suspension coding to adjust/compensate for the spring rates.

The KW HAS is half the cost of the M Performance, however the best option is still going to be a coil over system.

If you want to retain the EDC, KW offers a plug and play kit called the DDC (Dynamic Damper Control)

Agree on the coilovers. Had springs, and while they served their purpose, when I went to coilovers, I became very satisfied. Height adjustment, compression and rebound adjustability, and a well planted, decent ride.

[CanAutM3]

Originally Posted by Maitre_Absolut

The CS is not immune to the front wheel gap. Seems even worse since the back fender is flush to the wheels.

Anyone know the spring rates on the CS and of the aftermarket alternatives or the M performance HAS?

My first instinct is to go MP HAS to preserve warranty. Its still double the double the price of KW HAS though, which is then triple the price of springs. I've seen some do only a front spring swap, that seems like the simplest choice though only if rates would be close to CS stock.

MP HAS installed is 4k at my dealer which seems like overkill to fix a minor front end height problem (ideally 0.75" lower would be great).

I paid a smidge under $3k CAD tax in for the MP-HAS, parts, install and alignment included at my dealer. They even installed my GC camber plates as part of the deal (I purchase the GC camber plates separately).

[CanAutM3]

Originally Posted by Justin.AutoTalent

KW HAS is the same as M Performance, the M Performance is just rebranded and has suspension coding to adjust/compensate for the spring rates.

Are you sure about this? Looking at pictures, the MP-HAS and KW-HAS look like they are physically different.

[tropicatango]

Swift springs are very good and drop is perfect

[ROBERT1183]

Originally Posted by Tall Tom Cruise

Looks great. Could you tell me what size spacers F & R you're running?

I just picked up a KW HAS kit for my '18 M4 zcp. I was thinking 12mm spacers up front and 15mm in the rear after its dropped.

Thats what im running on it.

[knightarmor]

Also recommend MPHas. Just finished dialing mine in after eight months. Very pleased and I've always been against coilover sleeves but BMW got this right!

[Maitre_Absolut]

Originally Posted by reprod

You don't want to screw up the dynamics of the CS. I would recommend only MP HAS or Dinan HAS.

Don't cheap out on suspension. It substantially affects the driving characteristics of your vehicle.

Dinan advertises +50% spring rate over stock in the front. I can't imagine this working well with stock shocks.

I'm hoping that BMW HAS is closer but can't find any #s.

[Maitre_Absolut]

Originally Posted by CanAutM3

I paid a smidge under $3k CAD tax in for the MP-HAS, parts, install and alignment included at my dealer. They even installed my GC camber plates as part of the deal (I purchase the GC camber plates separately).

Are the camber plates mainly to adjust camber due to lowering? How necessary are these to maintain even tire wear?

[CanAutM3]

Originally Posted by Maitre_Absolut

Are the camber plates mainly to adjust camber due to lowering? How necessary are these to maintain even tire wear?

The camber plates are strictly for track use to minimize outer shoulder wear. They are not necessary (actually not recommended due to increased NVH and inner shoulder wear) for a street only driven car.

[Justin.AutoTalent]

Originally Posted by FatRear08

Agree on the coilovers. Had springs, and while they served their purpose, when I went to coilovers, I became very satisfied. Height adjustment, compression and rebound adjustability, and a well planted, decent ride.

Exactly how I felt when I went from Swift to V3

Originally Posted by CanAutM3

Are you sure about this? Looking at pictures, the MP-HAS and KW-HAS look like they are physically different.

Yes. You may be looking at the version 1 HAS from KW. The Version 2 (ANU part number) is the exact same, minus the coloring.



DSC04484 by Justin Shih, on Flickr

[knightarmor]

Justin,
Aren't the front springs different though? Looks like the KW's have a flat bottom and the MPHAS ones just end on a coil and the spring actually sits on a rubber seat on the adjustable collar, whereas the KW's seat directly onto the collar. I'm not an expert but technically they are not the same.
Spring rate wise they may be the same but doesn't look like that's been confirmed anywhere?

[CanAutM3]

Originally Posted by Justin.AutoTalent

Exactly how I felt when I went from Swift to V3



Yes. You may be looking at the version 1 HAS from KW. The Version 2 (ANU part number) is the exact same, minus the coloring.

Interesting about the KW-HAS versions, I did not know that they had a revised version. It is a good thing because there are severe interference issues with the early KW-HAS and 275 track tires with popular ET25 wheels. The MP-HAS are a tight fit, but they do clear the tires in a similar setup.

However, even when looking at the pictures, it seems like the front springs are different. Look at the spacing between the coils in the middle of the spring, the MP-HAS seem to have a tighter spacing than the KW-HAS, which indicates a different tuning for the variable rate.

[Justin.AutoTalent]

Originally Posted by CanAutM3

Interesting about the KW-HAS versions, I did not know that they had a revised version. It is a good thing because there are severe interference issues with the early KW-HAS and 275 track tires with popular ET25 wheels. The MP-HAS are a tight fit, but they do clear the tires in a similar setup.

However, even when looking at the pictures, it seems like the front springs are different. Look at the spacing between the coils in the middle of the spring, the MP-HAS seem to have a tighter spacing than the KW-HAS, which indicates a different tuning for the variable rate.

Correct the 9.5 or 10" width with offsets greater than 20mm would touch the perch with the wheel or tire.

Not here to argue, installed both in the shop, and they look pretty similar. Spring rates could be different, but visually looks very close and drop ranges follow

[Maitre_Absolut]

Dealer just got back to me saying BMW Canada will not warranty the BMW HAS on a CS.

They are offering me the Dinan HAS kit as an option since they are AD and have experience with installs. Dinan will also provide 3rd party warranty if dealer denies suspension related claim.

My preference would be KW since I have had the HAS on my S4 and was very happy with it. It is also much cheaper.

I see that some say Dinan doesnt lower the front much, I'm not looking for slammed but definitely don't want to be disappointed. Also any downside to riding at the lowest setting? Prob not.

I have asked for a spring rate comparison. Dinan advertises +50% (vs maybe the base model) in the front. I can't imagine that riding well on stock shocks.

[CanAutM3]

Originally Posted by Maitre_Absolut

Dealer just got back to me saying BMW Canada will not warranty the BMW HAS on a CS.

That's odd. No issue on my side with warranty .