Chase Bays Dual Piston Brake Booster Delete w/ Bolt-On 6:1 Pedal Ratio
2013–2020 Subaru BRZ, 2013–2016 Scion FR-S, 2017–2020 Toyota 86, 2022–2026 Toyota GR86 & Subaru BRZ
CB-DBBE-SUB
Overview:
The Chase Bays Dual Piston Brake Booster Delete kit is a precision-engineered manual brake conversion designed specifically for Subaru BRZ, Scion FR-S, Toyota 86, and Toyota GR86 models. This kit replaces the factory brake booster with a high-performance dual piston setup and a bolt-on 6:1 pedal ratio adapter, delivering superior brake feel and control for motorsport and spirited driving applications.
Ideal for track enthusiasts, drift racers, and rally drivers, this manual brake conversion improves lap times and enhances brake modulation by providing consistent, controllable braking performance. Backed by over 15,000 manual brake setups sold worldwide, Chase Bays offers a proven solution trusted by professional race teams and enthusiasts alike.
Key Features:
This kit is engineered to optimize braking leverage and pedal feel, offering a significant upgrade over stock systems and typical manual brake conversions.
- Dual piston brake booster delete design for improved brake response and consistency
- Bolt-on 6:1 pedal ratio adapter replicates high-end motorsport pedal boxes for superior mechanical advantage
- Allows use of a larger 1-inch bore master cylinder for increased fluid displacement and braking power
- Reduces pedal effort while maintaining a similar pedal throw distance for enhanced driver comfort
- Includes an ultra-compact 1-inch bore master cylinder optimized for performance applications
- Isolated front/rear circuit high heat polypropylene fluid reservoir with billet vented diaphragm cap
- Billet master cylinder to firewall adapter plate with weight-reducing hollowed design and raised mounting point
- Stainless steel hardware including L-banjo front outlet fitting and rear outlet hardline to adjustable bias valve
- Adjustable bias valve with -3AN 90Âş outlet for fine-tuning brake balance
- Durable carbon 4140 steel push rod and clevis for precise pedal actuation
Construction & Design:
The Chase Bays Dual Piston Brake Booster Delete kit features high-quality billet aluminum components and stainless steel hardware to ensure durability and corrosion resistance under demanding conditions. The pedal adapter is designed to bolt directly onto the factory pedal assembly, providing a precise 6:1 pedal ratio that significantly improves leverage compared to the stock 3.5:1 to 4.5:1 ratio.
The master cylinder and fluid reservoir are engineered for high heat tolerance, using polypropylene materials and a vented diaphragm cap to maintain fluid integrity during intense driving sessions. The firewall adapter plate is CNC-machined with a hollowed interior to reduce weight without compromising strength.
Installation & Fitment:
This kit is a bolt-on manual brake conversion designed for Subaru BRZ (2013–2020), Scion FR-S (2013–2016), Toyota 86 (2017–2020), and Toyota GR86 (2022+). Installation requires firewall modification to accommodate the master cylinder and adapter plate. The kit uses factory mounting points where applicable and includes all necessary hardware for assembly.
Proper setup is critical for optimal performance, and Chase Bays provides expert guidance based on extensive motorsport experience. This conversion is ideal for drivers seeking consistent brake feel and improved pedal leverage for track and drift applications.
What's Included:
- 1-inch bore ultra-compact master cylinder
- Isolated front/rear circuit high heat polypropylene fluid reservoir
- Billet Chase Bays reservoir cap with high heat vented diaphragm
- Billet master cylinder/firewall adapter plate with raised mounting point
- L-banjo front outlet fitting with stainless steel banjo bolt
- Stainless steel rear outlet hardline to adjustable bias valve
- Adjustable bias valve with -3AN 90Âş outlet
- Carbon 4140 steel push rod and clevis
- Stainless steel bolt-on 6:1 ratio pedal adapter
Ideal For:
- Motorsport enthusiasts seeking improved brake control and consistency
- Drift and rally drivers requiring precise brake modulation
- Track day drivers looking to reduce pedal effort while increasing braking power
- Owners of Subaru BRZ, Scion FR-S, Toyota 86, and Toyota GR86 wanting a professional-grade manual brake setup
