BX11 Boxmount BBK sale! Through August 26th, 2024
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Up to $100 off and free shipping in the US lower 48.
BX11 Boxmount BBK 90-05 Miata
Now with our proprietary Supermiata High Carbon 11" friction rings. These friction rings are the standard Wilwood dimensions so they are backwards compatible with all 11" BBK's that use a 6x6.25" bolt circle rotors.
What is a high carbon rotor you ask?
Standard OEM rotors are G3000/GG20 grade iron which is 3.2% carbon content. These are long lasting and inexpensive. Supermiata GG15HC High Carbon rotors are 3.7% carbon content. That might not seem like a big difference but that little extra carbon greatly reduces cracking, increases thermal conductivity (cooler running), increases friction, (more braking power), better thermal stability (reduced warping) and increased noise damping (no squeaks). High Carbon rotors cost a bit more to manufacture but the performance benefits are worth it.
![](https://www.949racing.com/wp-content/uploads/2021/07/Supermiata_BX11_Boxmount_Miata.jpg)
![](https://www.949racing.com/wp-content/uploads/2022/12/bx11-duct-assembly.jpg)
BX11 Boxmount BBK 90-05 Miata
Now with our proprietary Supermiata High Carbon 11" friction rings. These friction rings are the standard Wilwood dimensions so they are backwards compatible with all 11" BBK's that use a 6x6.25" bolt circle rotors.
What is a high carbon rotor you ask?
Standard OEM rotors are G3000/GG20 grade iron which is 3.2% carbon content. These are long lasting and inexpensive. Supermiata GG15HC High Carbon rotors are 3.7% carbon content. That might not seem like a big difference but that little extra carbon greatly reduces cracking, increases thermal conductivity (cooler running), increases friction, (more braking power), better thermal stability (reduced warping) and increased noise damping (no squeaks). High Carbon rotors cost a bit more to manufacture but the performance benefits are worth it.
![](https://www.949racing.com/wp-content/uploads/2021/07/Supermiata_BX11_Boxmount_Miata.jpg)
![](https://www.949racing.com/wp-content/uploads/2022/12/bx11-duct-assembly.jpg)
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