27WON BBK Brake Pad Replacement

First and foremost; THANK YOU for being a part of the 27WON Family

Provided brake pads are for spirited street and light track use. For heavy track use, different pads are required. See next step for recommendations

This guide starts at the caliper. For help getting the caliper off and on you can refer to our BBK installation instructions

FE1-3-413 11th Gen Front Big Brake Kit

Replacement of pads in 27WON BBK typically does not require removal of the calipers

All braking systems are a compromise of Performance, Dust, and Noise. These factors are all highly dependent on the brake pad material used

The 27WON BBK arrived to your door with a brake pad material we found to be a good compromise of the above three factors. The pad material is considered a "street sport" setup that will provide a low amount of dust, nearly zero noise (some noise if very cold), and good performance for most street driven applications

The 27WON BBK is designed around a very common pad size and shape. If desired you may seek out a brake pad compound that better suits your driving style and application

Brake Pad Options by Manufacturer - There are many more options available than shown

Hawk - HB110

Carbotech - CTCP3215

G-Loc - GPX6

Using a 5mm Allen wrench, remove the caliper bridge bolt

While loosening the bolt, push on the bridge spacer towards the rotor then remove the bolt

Remove bridge spacer and spring clip

Using a flathead screwdriver, push the brake pad away from the rotor as shown to provide clearance

Typically the brake pad backer plate has a small edge that can be pushed against

Locate the 90 degree pick tool for the next step

Using a 90deg pick tool, hook the pick on the backer plate of the brake pad then remove brake pad

Pull the top and bottom of the brake pad in even increments until the pad can be fully removed

With the brake pad removed you can now access the caliper pistons directly - you will need to fully press the pistons into the caliper to provide clearance for new brake pads

Sometimes while pressing one piston in, another piston will push out. If necessary, hold the other pistons in place while pressing a piston into the caliper

Install the new brake pad into the caliper as shown

Verify the brake pad material surface is towards the rotor face and the backer plate is towards the pistons

Repeat previous steps for the other pad

Re-install the brake pad spring clip and the caliper bridge spacer - hand thread the caliper bridge bolt and torque to 8-10 ft-lbs

Repeat brake pad replacement for the other caliper

Brake pads can be replaced without opening up the fluid system. It may not be necessary to bleed the brake system after pad replacement. If necessary, we include some instructions for this later in this guide

If the brakes are properly bled the brake pedal should have distinct "feel" to it

Brake pedal should have minimal down travel before pressure/force is felt

Brake pedal should feel firm after a small amount of down travel - it should not feel "spongy" or loose pressure over a quick amount of time

If your brake pedal does not correlate with the above, then go through the brake bleeding procedure

Brake pad bedding is an essential process to the life and durability of the brake pads and rotors - for optimal BBK performance please follow the steps below

Proper pad bedding slowly heats and cools the rotors & pads - do not hard brake during initial driving until after complete bedding procedure is complete

Find an open road and accelerate to 30mph - Brake evenly and smoothly at ~50% effort until the vehicle is almost stopped, then accelerate to 30mph again

Repeat above step 8-10 times

Find an open road and accelerate to 50mph - Brake evenly and smoothly at ~80% effort until the vehicle is almost stopped, then accelerate to 50mph again

Repeat above step 2-3 times

Allow ~15min for brakes to cool - You can now use the brakes for normal driving

This completes the installation of your 27WON Brake Pads for BBK

We hope you were impressed with your 27WON experience and love your BBK for years to come. Email us at sales@27won.com or call us at 571-271-0271 with any questions or concerns

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Proceed to the next step for the details on bleeding the brakes, if necessary

Both Left Hand and Right Hand BBK Systems must be installed completely before proceeding to the Brake Bleeding Procedure

Clean all brakeline connections at chassis and caliper with brake clean spray and clean rag

Tools - You will need a fresh container of Dot 4 Brake Fluid, bleeder bottle and hose as shown (the hose should fit tight on the bleeder screw), 10mm box-end wrench, and a friend to help with the process

For best results, always start with the bleed screw located the furthest away from the master cylinder and work your way closer. There are two bleed screws for each caliper. Follow the order below

First Bleed Screw - RH Outside

Second Bleed Screw - RH Inside

Third Bleed Screw - LH Outside

Last Bleed Screw - LH Inside

Remove the cap from the bleed screw as shown

Place the box end of the wrench over the bleed screw hex as shown

Put one end of the hose on the bleed screw as shown

Hang bottle from wheel studs as shown or set on ground

Have yourself or your friend setup in the driver's seat so that they can press the brake pedal firmly

Have the other person setup at the brake caliper so they can open/close the bleed screw

To open/close the bleed screw - you only need to turn the wrench ~1/4 turn

Have the person in the driver's seat press the brake pedal 3-5 times until there is sufficient pedal pressure. Then, have them hold the brake pedal firmly as the bleed screw is loosened. The pedal will go to the floor while fluid and air will enter the bottle. Make sure your friend holds the pedal down as you retighten the bleed screw.

The brake pedal will go to the floor while fluid and air will be pushed through the open bleed screw

Continue holding the brake pedal down until the bleed screw is re-tightened/closed

Repeat the above procedure around 3-5 times per bleed screw, or until your are confident there is no air in the system Check that your brake fluid level is at “full” after each bleed screw.

After each bleed screw is completed, check that your brake fluid level is at “full”. Refill as needed

Move to the next bleed screw until all four bleed screws have been completed

Once brake bleeding is complete, inspect all brakeline connections at chassis and caliper to verify there are no leaks