X73 Kit - AutoX
Thread Starter
8th Gear
Joined: Feb 2026
Posts: 8
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From: Burke, VA
X73 Kit - AutoX
Anyone autox with a X73 suspension kit on their Cayman? Wanted to know your thoughts.
My stock suspension on my 981CS is pretty much done with 95k and my past autox event.
Debating on X73 or Shaftworks Bilanx Coilovers. Not my daily, but a dedicated autox - not competing in any classes.
My stock suspension on my 981CS is pretty much done with 95k and my past autox event.
Debating on X73 or Shaftworks Bilanx Coilovers. Not my daily, but a dedicated autox - not competing in any classes.
Rennlist Member
Joined: Jul 2004
Posts: 734
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From: Nashville
Anyone autox with a X73 suspension kit on their Cayman? Wanted to know your thoughts.
My stock suspension on my 981CS is pretty much done with 95k and my past autox event.
Debating on X73 or Shaftworks Bilanx Coilovers. Not my daily, but a dedicated autox - not competing in any classes.
My stock suspension on my 981CS is pretty much done with 95k and my past autox event.
Debating on X73 or Shaftworks Bilanx Coilovers. Not my daily, but a dedicated autox - not competing in any classes.
They are back ordered right now, with the club spec using them they will likely sell out quick when they do arrive.
Thread Starter
8th Gear
Joined: Feb 2026
Posts: 8
Likes: 2
From: Burke, VA
Your car looks pretty planted especially through the slalom. Any other mods besides x73 and 200tw?
My car sways alot and i had to becareful through slalom or else i'd understeer, hard to tell with this video, but i'm sure sway is a given with the suspension on its way out haha
My car sways alot and i had to becareful through slalom or else i'd understeer, hard to tell with this video, but i'm sure sway is a given with the suspension on its way out haha
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Joined: Jul 2004
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From: Nashville
Camber plates on the front. SCCA club spec cayman. It's has more body roll than I'm used to coming from a GT4 and GT3, but it's not far off and is quite playful/responsive.
On the street the rear settles slightly after the front like my 986 does which I don't love, but it hasn't done it on autoX/track.
On the street the rear settles slightly after the front like my 986 does which I don't love, but it hasn't done it on autoX/track.
Last edited by ztnedman1; Apr 22, 2026 at 10:11 AM.
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From: Idaho
It depends somewhat on what class you want to go to. If you use x73 and the accompanying dampers, you get upgraded sway bars and springs too, with the ability to still run street classes as it’s considered a stock option. If you put in aftermarket coilovers, you’ll bump to an ST class. This assumes SCCA classing. Pca classing is weird. (Dumb)
If you buy aftermarket like Bilanx, you’d probably want to upgrade your front bar to a gt3 style anyway to make the most of the shocks.
If you buy aftermarket like Bilanx, you’d probably want to upgrade your front bar to a gt3 style anyway to make the most of the shocks.
Racer
Joined: Jan 2017
Posts: 455
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Not quite the question but does shaftworks make 981 parts? They only have 986/7 listed on their site.
I would not go with the GT3 bar....really under any circumstance, but especially if you're putting good spring rates on the front. It's one or the other - giant bar or stiff springs, both is just overkill.
I would not go with the GT3 bar....really under any circumstance, but especially if you're putting good spring rates on the front. It's one or the other - giant bar or stiff springs, both is just overkill.
Last edited by dps214; Apr 22, 2026 at 02:25 PM.
Thread Starter
8th Gear
Joined: Feb 2026
Posts: 8
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From: Burke, VA
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Racer
Joined: Jan 2017
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So that's basically 450/600lb/in? Rear sounds a little stiff to me but might be okay depending on what the rest of the setup is. You have to decide what exactly you want out of the car. That setup (maybe more like 450/500) will autocross well but will likely be a bit harsh on the street. Also depends on how much travel the struts have and the condition of both your roads and autocross venue(s).
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From: Bloomington, IL
Call and talk to Jon Lugod, the owner. I just threw away my notes from our conversation from last year but he had several tiers of JRZ for anyone else who may be interested with custom valving he asserts makes the shocks much better than the Bilanx. As for spring rates, I would ask him directly. He said he has set up several Cayman/Boxsters out in CA and would know what rates would work best with those units. As an example, ARC Flash sells the Ohlins DFV with a variety of custom valving (mine are the 458F/572R) which are fairly stiff at the more aggressive settings but quite comfortable at the softer settings. It's all about the valving of the shock and what it can handle.