JK Brake Master Cylinder with Oversized Bore
This JK brake master cylinder compensates for the larger caliper piston size with an oversized bore that has 14% more flow to provide greater fluid volume to the front Big Brake Kit. We highly recommend this master cylinder for 2007-2011 JKs with the Big Brake Kit to provide a firm pedal feel. 2012+ JKs do not need this kit. Note: Specific steps must be taken when bleeding the brake system, a bench bleed is recommended before installing the master cylinder into the Jeep. Slowly pump the pedal during the bleed process to avoid seal damage.
- Fits 2007 to 2016 Jeep JK Wrangler, Rubicon and Unlimited
- 2 and 4-door models
- 14% more flow
- Eliminates soft pedal
- Replaces stock master cylinder
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