KW  Variant 3 Coil-Over

Premium, Performance Street, Autocross/Track
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"Race technology for the road with adjustable compression and rebound damping"

State-of-the-art motorsport technology for proven performance on the streets. The independently adjustable compression and rebound damping allows for custom driving set-ups. The exclusive KW patented system has dual-level valves to provide the adjustment of the rebound damping (comfort) and the compression damping (driving dynamics) in the low-speed range. High-speed settings for driving comfort are preset by KW engineers.

  • Independently adjustable damping technology (rebound and compression damping)
  • "inox-line" stainless steel technology*
  • Individual height adjustment
  • Infinitely adjustable rebound damping
  • 14-level adjustable compression damping
  • Unique, independently functioning damping power adjustment
  • TÜV-tested adjustment parameters
  • High-quality components for long life
  • Comprehensive documentation for ease of use

Based on vehicle specifications, the rebound damping is adjusted by a spindle at the end of the piston rod. Mainly, the traction phase (rebound) controls car body vibrations and influences handling and comfort in the low-speed damping range. By using the traction phase adjustment, the vehicle can be fine tuned to the requirements of the driver. Moreover, driving behavior can be regulated from comfortably rolling to sporty and tense with improved road holding characteristics.

The compression phase adjustment is carried out at the lower end of the shock absorber via KW's patented multi-purpose valve. The large number of pre-set parameters on this valve allow for a wide range of adjustment for individual use. The unique low-speed compression adjustment distinguishes this technology from any other. In this compression range, the driving behavior of the vehicle is drastically influenced. An increase of the damping power supports the vehicle already during compression and therefore avoids rolling and pitching. The directional stability is significantly improved.

*Not for suspensions with strut modifications (exchange struts).

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Media Gallery

A Look at KW Suspension Components (02:27)

KW suspension components, up close and personal. Get a glimpse into KW's development and assembly facilities as the Clubsport Coil-Over and Variant 1/2/3 Coil-Overs are showcased in this video.

Project STR Wrap-Up: Introduction (03:26)

Watch as SCCA drivers John Rogers and Chris Harvey talk about how Per Schroeder's (of Grassroots Motorsports) idea evolved into Project STR. From selecting the vehicle to acquiring the parts to testing the improvements, Rogers and Harvey take a look back at the project.

Project STR Wrap-Up: The Tire & Wheels (03:06)

What additions made the biggest improvement to the Project STR Mazda MX-5 driven by John Rogers and Chris Harvey during SCCA competition? The starting point: a larger Tire & Wheel Package. Get the details when you watch this video! And learn about the myth they busted as a result of their work on this project, too.

Project STR Wrap-Up: The Suspension (02:35)

How did Project STR drivers John Rogers and Chris Harvey tweak the suspension of the Mazda MX-5 for both street and track driving? Which off-the-shelf products from Tire Rack were used to fine-tune balance and handling? And did they see improvements in lap times? Find out in this wrap-up of Project STR.

Project STR Wrap-Up: Closing Thoughts (06:35)

John Rogers and Chris Harvey, Project STR drivers, reminisce over their 350 competitive autocross runs in two years. What were their favorite memories and their thoughts on the first years of the STR SCCA class? Don't miss these highlights and the final few minutes of the video when the MX-5 is stripped of its unique graphics!

The 2010 Mazda MX-5 & Project STR (02:14)

Tire Rack and Grassroots Motorsports Magazine teamed up to build a competitive car for SCCA STR Class autocross competition. 2010 was its inaugural season and it was a good one! Watch as we go from our first race to the "Big Dance" at the national championships in this video recap of the year.

2010 Tire Rack SCCA Great Lakes Divisional Championship - Project STR Mazda MX-5 (02:09)

Our team traveled to Peru, IN for the 2010 Great Lakes Divisional Championship event. This site is the best simulation of the Solo Nationals course surface we can find east of the Mississippi.

The battle was tight all weekend and if the competition at the Tire Rack SCCA Pro Solo Finale and Solo National Championship in Lincoln, NE is this tight, it's going to be a heck of a battle to see what driver/car/tire combination comes out on top.

Here's a look at how Tire Rack driver John Rogers posted the fastest STR Class time of the day on Sunday at the 2010 Tire Rack SCCA Great Lakes Divisional Championship.

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