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CMS Performance Tubular Adjustable Sway Bar Kit for Porsche 981 Boxster/Cayman (2012-16)

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CMS 981 Sway Bars (Guards Red)

The Single Best Modification for the Porsche 981.


FITS: 2012-2016 981 Base, S, GTS, Spyder, GT4



Competition Motorsport has engineered the perfect replacement sway bars for the Porsche 981 Cayman or Boxster (GT4/Spyder, GTS, S, or base model). Through countless hours of testing, through thousands of street/highway miles and hundreds of laps at racetracks around the country, the CMS Performance Sway Bars perform flawlessly and greatly improve the handling and tunability of the Porsche 981. With five holes of adjustment both front and rear, these large-diameter bars can adjust from slightly softer than stock to much stiffer, giving you a wide range within which to tune your car's handling depending on the road or track you're tackling.

Included are OEM Porsche sway bar bushings, precision-machined for worry-free fitment, OEM quality, and a noise-free installation. CMS sway bars are engineered and manufactured in the USA with drop-forged ends for incredible strength and performance.


CMS Performance Sway Bars for the 981 have diameters of 31.8mm (front) and 25.4mm (rear), 30% larger than the already-uprated OEM Cayman GT4 bars! This creates a stronger, stiffer platform from which to work for all the 981 variants. Additionally, the range of adjustment of each bar goes from 1% softer than stock to 50% stiffer. This gives you a huge range of relative front-to-rear spring rate to fine-tune the handling of your Porsche.


We powder coat each sway bar for ultra-durability. Choose from four stock colors (Basalt black, Guards red, Racing yellow, GT silver). Or we will coat them in any of our thousands of custom colors for only $100!

With CMS Sway Bars you can balance your front-to-rear handling to suit any road or track.


Designed and manufactured in the USA using all US components, developed specifically for the Porsche 981, including the track-ready GT4.

  • OEM Cayman GT4 drop links, both front and rear, work perfectly with the CMS adjustable sway bars -- no need to replace them!
  • Base, S, GTS, and Boxster Spyder require CMS front drop links ($150). These OEM Porsche front links are customized to work with the adjustable CMS front sway bar. Your original rear drop links do not need to be replaced.


  • Front and rear five-way-adjustable sway bars w/ forged ends
  • OEM Porsche bushings custom-machined to our specifications

Optional: OEM Porsche front drop link set, customized to our specification (required for Base, S, GTS, and Spyder only) $150


1 Review Hide Reviews Show Reviews

  • 5

    Posted by Jacob M. on May 14th 2018

    Bought these for my GT4. They were aweesome. Made a huge difference compared to stock. Car handled much better. Ran Mid-Ohio last week and I let one of their pro instructors take my car for a few laps...first thing he said when he got out was "Those sway bars are incredible!"

    I have bought a variety of different products from CMS and will continue to reach out to them in the future. Pete and Brian know their stuff, and are more than happy to help with questions/give advice.

    Thanks again guys!