GMS SLR BBK improves braking power due to the bigger diameter disc (330mm x 28mm front and 302 x 22mm rear) and revised brake bias. Increased rotor diameter requires less pedal force for the same amount of torque applied to the wheels, meaning less heat and better modulation, while thick rotor core provides superior heat management. Discs braking surface features J-hook grooves, providing significantly improved de-dusting capabilities and cracking resistance compared to OEM and aftermarket drilled discs. Discs inner venting vanes are directional, providing supreme heat dissipation.
 
These are the only disc on the market that feature true, fully floating design, which means that aluminum bells are not directly connected to the brake disc rotors as they commonly are, instead they slide within the bobbin grooves, making them much more capable of withstanding extreme thermal expansion without getting warped.
 
The brake disc ring casting is a high content carbon, heat treated alloy, with low expansion properties under heat stress to provide least possible thermal expansion during its operation. Each GMS SLR disc is also dynamically weight balanced to prevent potential vibrations at high speed.
 
Front and rear disc sizes are carefully sized to transfer brake bias from a very conservative factory setup of 64% / 36% to a bit more rearward biased, performance orientated setup, making the car more agile and controllable during the braking especially noticeable on trail braking. Discs sizes allow you to still fit 17'' wheels. We also didn't forget about the weight. Even though there is a significant difference in size and braking performance, the weight is increased only for 1650g over OEM system.
 
As the disc wear on the track is significant, the brakes have to be overhauled or replaced often, so GMS SLR brake disc rotors are also available as a replacement part which saves the cost of replacing entire brake discs, as only brake disc rotors can be replaced instead.
 
Kit includes:
 
1x GMS SLR BBK fully floating bobbin system front left disc 330mm x 28mm
1x GMS SLR BBK fully floating bobbin system front right disc 330mm x 28mm
1x GMS SLR BBK fully floating bobbin system rear left disc 320mm x 22mm
1x GMS SLR BBK fully floating bobbin system rear right disc 320mm x 22mm
1x GMS SLR BBK mounting hardware (2x front adapter, 2x rear adapter, extended SS hoses)
 
If you are looking for the ultimate brake upgrade system on the market available for your 4C, look no further.
 
This system fits to OEM brake calipers!