CMS Performance Roll Bar for Porsche Cayman GT4RS 1 "a"


Powder Coat Color

CMS Performance Roll Bar for Porsche Cayman GT4RS


Powder Coat Color

Price Including Options:


CMS Performance Bolt-In Roll Bar For Porsche 718 Cayman GT4RS

FITS: 2023+ (718) Cayman GT4RS


The CMS Performance GT4RS Roll Bar is the strongest, safest, and most beautifully constructed roll bar on the market for your Cayman GT4RS. In designing our roll bar for your GT4RS, safety and structural rigidity were our primary goals. That's why we use 1.75 x .095" Docol R8 Advanced High-Strength Steel tubing, much stronger than the smaller 4130 CrMo tubing others use.

The CMS GT4RS Roll bar harness cross-bar is designed to put your harness shoulder straps at the proper angle (0° to -20°) and distance to the driver, regardless of your seat position. Yet the CMS roll bar requires no cutting through the carpeted hump in the middle of your interior (replacing this carpet is expensive if you ever want to return your car to stock). This also provides an ideal mount for a SmartyCam video camera.


Our use of Docol R8 tubing throughout also lets us to keep the driver's rear view unobstructed by the rear diagonal bracing typically used to support weaker roll bars. This also gives you unfettered access to the engine cover without removing any part of your roll bar. Other roll bars require partial removal to get at your engine -- not ideal in a car that sees track time.

The CMS GT4RS roll bar's rear kickers route over the incredible carbon fiber intakes and engine cover and bolt to the GT4RS's rear shock towers, the safest, strongest possible mounting point. This adds rigidity to the chassis and suspension. The main roll hoop is mounted to the frame structure across the rear bulkhead for lighter weight and superior strength.


We'll powder coat your roll bar in a color custom-matched to Porsche's GT4RS OEM color palette. Or you can go with our rich satin black for a more stealthy look. Every CMS GT4RS roll bar is professionally powder-coated to order, in-house by Competition Coatings.

Fully TIG welded by master welders using superior materials, the design, strength, fit, and finish of the CMS GT4RS roll bar all add up to this: you can spend more on a roll bar, but you only get the best from CMS.


Add six-point Schroth Enduro 2x2 GT4 , Schroth Flexi 2x2 GT4 , or Sabelt Silver Series GT4 , or four-point Schroth Profi II ASM GT4 harnesses to your order using our convenient pull-down menus above! These harnesses are specifically designed to bolt right up to your Porsche GT$RS carbon lightweight bucket seats. (Porsche's passenger-side seat does not have a factory sub-strap pass through.)

If you're installing six-point harnesses in your Porsche, we strongly recommend adding the CMS Performance Sub Strap Mounts to your order. They provide a solid, properly located anchor for your anti-submarine straps, are easy to install.

Click Here For Installation Instructions



  • Main hoop and kickers 1.75 x .095" Docol R8 Advanced High-Strength Steel
  • Fully TIG welded
  • One-piece main hoop 
  • Three-piece rear kickers make installation so much easier
  • Easy engine access without removing any part of the roll bar
  • No cutting of your central carpet
  • Laser-cut mounting plates
  • Designed, built, and finished by CMS in the US
  • CNC machined high-strength-steel interlocking clamps to ease installation
  • Easy to install and perfect fitment guaranteed
  • Comes with detailed installation instructions and all necessary hardware



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