The GKTECH ZN6 FR-S/ ZC6 BRZ dual caliper bracket e-brake bolt kit allows for the use of your OEM drum/e-brake setup in conjunction with our dual caliper bracket. If you aren't running our dual caliper bracket, this bolt kit is of no use to you. If you are running our dual caliper kit, you probably should have this too. - CNC Machined from 4130 chromoly - Bolt on part with no modifications required Vehicle Compatibility: - Scion FR-S - Subaru ZC6 BRZ - Toyota ZN6 GT86