Honda Civic EG/EK & Integra DA9/DC2 Brake Booster Delete Kit

The benefits of deleting your brake booster for performance driving and Motorsport are:

• Reduced compliance between the pedal and the master cylinder which translates to a firm pedal feel
• No lag between the pressure in the brake lines and the force on the pedal and thus improved braking control
• Reduced sensitivity which makes modulating brake force easier
• Weight reduction

Unique features of the Honed booster delete kit

• 6:1 pedal ratio achieved with an offset mounting location for the master cylinder and creating a new mounting hole in your brake pedal for the push rod clevis (template provided)
• Designed to utilize OEM Honda master cylinders which are a dual cylinder design (safe) and are comparable quality to your original master cylinder
• Mounts in the same way as a Honda booster, with studs

In order for you to have this set up installed in your car you will need to source a master cylinder from a Honda Civic 1996 – 2000 (EK generation)

OEM Master Cylinder Part Numbers

7/8″

RHD: 46100-S04-J53

LHD: 46100-S04-A14, 46100-S04-L53

13/16″

RHD: 46100-S04-J01

LHD: 46100-S04-A02

If you have 282mm factory front brakes or 282mm+ rotors with aftermarket calipers (Spoon, Willwood etc) we recommend using the 7/8″ master cylinder

If you have 262mm (or smaller) factory front brakes we recommend using the 13/16″ master cylinder

We source our Master Cylinders from a local pick-a-part wreckers where they can be had for a reasonable price but of course you can also source new from Honda.

It is perfectly fine to use our booster delete kit with the oem proportioning valve

If you are replacing the original booster and master cylinder from your EG and you intend to keep the oem proportioning valve on the firewall you can reuse the factory hard lines from the oem proportioning valve

If you are using an aftermarket proportioning valve then you may need to make new lines to suit the new master cylinder location

We have a blog post on our site that steps through the installation process:

CR-X Build 34: Booster delete install

We have a post about the testing we did to compare the stopping performance of a Civic with the booster delete fitted to it’s stock performance:

Booster Delete Kit Testing: Comparing Boosted and Non Boosted Braking Performance

Here’s a video of Grant talking about what it’s like to drive on the street in a Civic with the booster delete kit fitted:

Q&A

Q) Can I use a 1″ Master Cylinder with this kit?

A) Mechanically, you could, however, there is a leverage-like effect to reducing the size of the master cylinder relative to the caliper pistons which is a great benefit to reducing the required pedal effort and keeping a natural feeling pedal stroke. 

Q) Where can I find Master Cylinders? 

A) We can supply used RHD 7/8″ master cylinders or new aftermarket LHD 7/8″ master cylinders. You can find them here:

Brake Control Category Page

Alternatively, pick-a-part wreakers are a good source or ebay and similar online retailers. 

It’s important to source master cylinders that don’t have the protruding tube on the side where the pushrod goes.