Bilstein Universal Motorsports Struts

Car builders and fabricators in a variety of motorsports including rally, sports car, and SCCA now have a unique shock option available to them, thanks to a new design from BILSTEIN motorsports engineers. The engineers developed a new universal motorsports strut line featuring BILSTEIN’s inverted tube technology to provide race car builders a wide selection of travel lengths and valving options, for building custom chassis where a bolt-on application would not work. This semi-complete package can be adapted to most MacPherson strut suspension systems. Each strut is supplied with a matched external housing that permits the builder to fabricate weld tabs for mounting the unit to a vehicle’s lower steering knuckle. The strut insert is provided with a blank upper-stem that can be machined down to fit a specific top mount or camber/caster plate variation. Utilizing the same technological design advantages as their gas pressure shock absorbers, the BILSTEIN monotube strut insert is installed with the piston rod at the base of the strut tube. Here the rod is completely protected from road contamination of any kind. Plus, the hard-chromed steel body of the damper provides superior strength to withstand the extreme side loads encountered in competition, delivering exceptional stability and greater performance.

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Bilstein 46mm Universal Motorsports Struts

Bilstein 36mm Universal Motorsports Struts

What do those valving numbers mean?

The number format is as follows, Rebound/Compression in newtons of force at .5 m/s divided by 10. An example of this would be: 380/180 Valving is 3800 newtons of Rebound force and 1800 newtons of Compression force at a shaft speed of .5 meters per second. This drawing supplies all of the dimensions you should be looking for on the 46mm Universal Struts. Use these dimensions to determine the best fit for your application. Call us if you need help or have some more questions about your application. click on the drawing for a .pdf version you can download or print out. Notice that the piston size is 46mm and the shaft size is 50mm. Compare these to the other 50mm struts that are out there. 46mm Universal Struts Dimension Chart Drawing
  • Large 46mm linear piston with precise valving profiles
  • 50mm OD, hard-chromed strut insert tube for strength
  • 14mm piston rod for added side-load support
  • Increased oil and nitrogen chamber volume for consistent performance at high operating temperatures
  • High-temperature motorsport shock oil
  • 100 micron stainless steel breather vent located at the base of the strut housing
  • Four standard valving profiles for each of four travel lengths: 9”, 8”, 7” and 6” stroke

  Included spring hardware kit with 46mm kits: Threaded spring seat, lock ring and spring hat for use with 2.5” ID to 4” OD barrel springs

Below is the dimensional drawing for the 36mm Universal struts. The 36mm Struts do not come with spring hardware kits. The optional kits are listed on the drawing by part number. 

Bilstein 36mm Universal Strut Dimensions


Bilstein UMS Rally Strut Flyer Rear