Product Details
The KSport Circuit Pro 3 Way Adjustable Coilover Kit is the top of the KSport track-day ladder for the 2014-2018 Mazda 3. Three independent knobs separate high-speed compression, low-speed compression, and rebound — so you can control how the chassis reacts to curbs, how it settles through a fast sweeper, and how it recovers from a hard braking zone, all without touching the other two axes.
For serious Mazda 3 track drivers and race teams, the Circuit Pro delivers the setup flexibility you need to get the absolute last tenth out of a lap. Remote reservoirs provide the oil volume and heat capacity required for long sessions, and the monotube design gives the consistent performance that makes your data meaningful. This is a full race coilover you can still dial back for the drive home.
Features
- Built for racing
- External reservoirs for independent rebound and compression adjustment
- 11,664 possible tuning combinations
- Stiffer spring rates and shock valving combined with 20-30mm shorter shock stroke
- Upgraded bumpstops to prevent the shock from bottoming out over uneven pavement or harsh road conditions.
- 36 levels of damping which allow you the ability to perfectly dial in your coilover system
- Collars and upper mounts made from 6061 aluminum with T6 for increased hardness
- Adjustable spring perch for height adjustment
- All metal pillowball for added strength and responsiveness
- Adjustable lower mount allowing maximum suspension travel
- Monotube high pressure design for better performance and heat dissipation
- Electroplated body for added protection from corrosion and rust
Specifications
| Part Number | CMZ321-C3 |
| Damping Adjustment | 3-Way (High-Speed Compression, Low-Speed Compression, Rebound) |
| Height Adjustable | Yes |
| Spring Rate (Front) | 16.0 kg/mm (896 lbs/in) |
| Spring Rate (Rear) | 12.0 kg/mm (672 lbs/in) |
| Spring Type | Linear |
| Top Mount (Front) | Pillowball Mount with camber adjustment |
| Top Mount (Rear) | Iron Mount no camber adjustment |
| Notes | True Rear Coilover |
Vehicle Fitment
- 2014 Mazda 3
- 2015 Mazda 3
- 2016 Mazda 3
- 2017 Mazda 3
- 2018 Mazda 3

