Chase Bays Dual Piston Brake Booster Delete with Bolt-On 6:1 Pedal Ratio | Subaru WRX / STI & Scion FR-S / Toyota 86 / Subaru BRZ (CB-DBBE-SUB)

Dual Piston Brake Booster Delete with Bolt-On 6:1 Pedal Ratio by Chase Bays

A properly set up Manual Brake Conversion Kit improves lap times and makes for a more controllable drift / rally car. There is a lot of incorrect information out there about Manual Brakes, from forums to other videos. Chase Bays has sold over 15,000 Manual Brake setups in the last 10 years…everything from winning Road Race chassis to winning Drift chassis.

A proper manual brake setup (matched ratio with MC bore size, good pad compound, and Front / Rear Bias Adjustment) is the exact same braking every time. The modulation of max braking just before lockup is where manual brakes really thrive. Chase Bays calls it the 90-99% zone. Finding the exact level of leg pressure to get that exact threshold is just not possible with power brakes, they’re too inconsistent…especially with boost. Acquired Motorsport Data isn’t wrong. YES the 90-99% zone is a little more leg effort than power brakes but that’s what makes it so great. This is massively to our benefit in finding the right leg force every time.

Chase Bays firmly believes in the quote “Success is in the details.” One look at their products, and you’ll note how detail oriented they are. From the initial thought and idea, the R&D, the testing, and the final release to being a product for sale. Nothing is left out and Chase Bays tries to consider everything. Their products are rigorously tested to make sure they work well against their own abuse and eventually yours.

Please Note: You will need to purchase the Chase Bays Brake Line relocation kit for your platform or make a custom line. (All 3 outlets are -3AN Male)

Features

• Pedal Ratio change of 4:1 to 6:1 via supplied Bolt-On Bracket for increased leverage on Master Cylinder
• True Dual Piston Master Cylinder and Isolated Front and Rear Circuits within Reservoir
• Carbon 4140 Steel Push Rod and Clevis
• Adjustable Bias Valve w/ -3AN 90º Outlet
• SS Rear Outlet Hardline to Adj. Bias Valve
• L-Banjo Front Outlet Fitting for easy front line mounting w/ SS Banjo Bolt

Benefits

• Consistent and Controllable Brakes for the EXACT same braking every time
• High Heat Vented Diaphragm to keep temperatures low
• Pedal Ratio change accentuates manual braking 

Applications

• 1992 – 2007 Subaru Impreza Coupe, Sedan, Wagon, RS, WRX, WRX / STI
• 2008 – 2014 Subaru Impreza Sedan & Hatch, WRX, WRX / STI
• 2015 – 2021 Subaru Impreza, WRX, WRX / STI
• 2021+ Subaru Impreza, WRX, WRX / STI
• 2013 – 2016 Scion FR-S
• 2012 – 2021 Toyota 86 / GT86
• 2021+ Toyota GR86
• 2012+ Subaru BRZ

What’s In The Box?

• 1 – 1 inch Bore Ultra Compact Master Cylinder
• 1 – Isolated F/R Circuit High Heat Polypropylene Fluid Reservoir
• 1 – Billet Chase Bays Reservoir Cap with High Heat Vented Diaphragm
• 1 – Billet MC / Firewall Adapter Plate with Raised Mounting Point
• 1 – L-Banjo Front Outlet Fitting for easy front line mounting w/ SS Banjo Bolt
• 1 – SS Rear Outlet Hardline to Adj. Bias Valve
• 1 – Carbon 4140 Steel Push Rod and Clevis
• 1 – Adjustable Bias Valve w/ -3AN 90º Outlet
• 1 – Stainless Steel Bolt-On 6:1 Ratio Pedal Adapter

References

• Installation Guide
• Clearancing Guide

Warranty

• Limited Manufacturers Warranty