[TT0997]

Got a quote for KW HAS with ref to G80/82.

Can someone confirm it is really the same or if KW issued a specific ref for G87?

Thanks guys !

[chrisg123]

Originally Posted by Bayliss21

I ended up purchasing AST's 5100 Competition Coilovers. I'll post a review after I take the M2 to Circuit of Americas on June 8/9.

How are you liking the coilovers? Are they good for street driving? Not to harsh?

[nightfire]

I added the MP kit to my build, but then backed out. They quoted me $3,100 and I just can't justify it for a set of springs. I'll either go aftermarket and take the risk with a small drop, or just get coilovers and set them up for street/track. I drove a track prepped M2 from RSR that had KW V4 coilovers. I drove through Germany and Belgium for several days and tracked it on the Nurburgring and Spa and it was a perfect set up. A bit stiffer on the street, but never harsh, and handled very well on track, especially through high speed turns like Pouhon where the car needs to be balanced on the limit.

[CaptainKibbles]

Was going back and forth between KW & M Perf, decided to go with M performance after talking with multiple members/people who installed both. Just got the car back this afternoon from install, and I am extremely happy with the choice. Ride quality is very similar to OEM, very very, small but GOOD differences. Collars are lowered all the way down.

[chrisg123]

Originally Posted by Bayliss21

I ended up purchasing AST's 5100 Competition Coilovers. I'll post a review after I take the M2 to Circuit of Americas on June 8/9.

How are you liking the coilovers? I have kw has and they fell a little to stiff steering and dampening up front.

[RobM2]

I have read this whole thread twice and don't see a clear consensus.

Here's what I'd like:

• Slightly stiffer suspension for better handling (mostly for road so nothing crazy)
• Lower the car just enough to close the ugly gap, don't want to slam it
• Not have my struts explode

My thoughts:

• The fact both the KW and MP HAS kits are the same across the G8X cars is worrisome, as I believe the stock M2 springs are unique to the G87 — do we lose custom tuning going to these generic parts?
• Are the KW or MP HAS kits actually stiffer?
• What's the blowout problem with KW? Is that real?
• I don't care about the color of the springs lol

My initial bias is to prefer the KW HAS as I would expect them to be stiffer and I'd prefer something more unique than the MP option. I don't really care about the warranty risk with KW over MP, but that's assuming they don't have a quality problem with a significant risk of strut failure.

What do knowledgable folks think?

Any feedback on performance (not just drop height) from folks who have made the conversion?

Here's the parts on EAS:

• KW HAS
• MP HAS
• and here's the H&R HAS for good measure

Help me decide what to do!

[chrisg123]

I’ll have a set of kw has for $1000 slightly used in about 2 weeks if your interested.

[bhutch]

What about the Dinan, they claim to be specifically for the G87.

[RobM2]

Originally Posted by chrisg123

I’ll have a set of kw has for $1000 slightly used in about 2 weeks if your interested.

Appreciate the offer but if I decide to do this I'll buy new.

[RobM2]

Originally Posted by bhutch

What about the Dinan, they claim to be specifically for the G87.

Definitely should consider it — particularly if anyone with them chimes in positively — but I'm not super excited by their offerings these days.

H&R and KW specialize in suspension, which is a fairly niche engineering discipline.

[NewToM]

H&R was suggested to me and I’ve had it for about a month. Very happy with it.

[M_Power Rob]

Originally Posted by NewToM

H&R was suggested to me and I’ve had it for about a month. Very happy with it.

For those looking for height adjustable springs, I would recommend H&R. Otherwise, my recommendation is coilovers.

[Christian_M387]

Originally Posted by NewToM

H&R was suggested to me and I’ve had it for about a month. Very happy with it.

Can you notice a slightly firmer suspension?

[NewToM]

Originally Posted by Christian_M387

Can you notice a slightly firmer suspension?

I will be the first to admit that I am not the most observant. My wife has issues with car sickness and I was worried it would firm up too much but she has been fine.

[Christian_M387]

I understand, I'm also looking for a way to get more performance out of the standard damping with slightly higher spring rates. But hardly any of the manufacturers comment specifically on this.

[RobM2]

Originally Posted by Christian_M387

I understand, I'm also looking for a way to get more performance out of the standard damping with slightly higher spring rates. But hardly any of the manufacturers comment specifically on this.

Same here.

[Christian_M387]

There is the option of using adapters to drive the KW Motorsport springs; appropriate rates and lengths can be ordered. But it is questionable whether it really works that way in the end

[Orange fever]

I'm on
Wheels : stocks
Tires: Yokohama
Suspension: KW Suspensions - HAS Height Adjustable Spring Kit
Wheel Spacer: Macht Schnell 12 mm (F) and 15mm (R) and Macht Schnell - Competition Stud Conversion Kit /// love it

[RichyN]

The MP HAS kit is designed for the full G8X range.
The G87 as standard has soft springs to give a more playful
dynamic I believe. I have the MP HAS kit fitted and find it much better for me.
bit firmer - initially the car feels like it in on Sport mode for dampers when in comfort that is exactly how much stiffer it feels. I was very pleased with this mod. However since then I have had camber plates fitted with extra caster build in and rear adjustable tow arms. This really does change the way the car feels and lets you lean hard on the front corners without the standard understeer.
To describe initial impressions with the mods would be its like the front wheels have been moved a couple of feet closer to the driver so steering and dynamics are far more intimate.