Free Shipping on Orders Over $75. Details

Talk to Wrangler Enthusiasts
1-877-870-8556
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your Wrangler! Enter daily!

RT Off-Road Dual Diaphragm Power Brake Booster Conversion Kit (87-90 Jeep Wrangler YJ)

ExtremeTerrain no longer carries the RT Off-Road Dual Diaphragm Power Brake Booster Conversion Kit (87-90 Jeep Wrangler YJ). Please check out 1987-1995 Jeep Wrangler YJ Brake Components & Hardware for an updated selection.

Details

These heavy duty power brake conversion kits convert a single diaphragm booster to a dual diaphragm, Setup which creates more stopping power with less pedal pressure.

Fits:

Jeep Wrangler (1987-1990),1 1/8" MC Bore Size,4 wheel disc brakes or aftermarket axles.

NOTE: Engine vacuum needs to be a minimum of 18 inches of vacuum at idle when engine is warm for power brake setup to function properly. Please confirm prior to ordering.

Fitment: 1987 1988 1989 1990 Details

MPN# DDBYJ1

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Will it fit my Wrangler?

    Customer Photos

      Questions & Answers (3)

      3 Top Rated Questions

      Does this master cylinder have the same 1/2 and 7/16 port as the stock master cylinder

      • Yes, this item would have the same 1/2 and 7/16 ports as the stock master cylinder.

      Helpful (0)

      Will this conversion work with rear drum brakes and is it simple bolt on replacement? Thanks so much, Aaron

      • The Crown Automotive Dual Diaphragm Power Brake Booster Conversion Kit is designed for the 1991 - 1995 Wrangler YJ Equipped with 4-Wheel Disc Brakes, so unfortunately it would not work with rear drums. The install is also on the Advanced level of skill to install this conversion kit, it is not a simple bolt on install.

      Helpful (0)

      What is the size of the booster in inches

      • The Crown Automotive Dual Diaphragm Power Brake Booster Conversion Kit will have a 1 1/8" Bore master cylinder, however they do not have a listing of the booster diameter for this kit.

      Helpful (0)
      Post Your Question

        Customer Reviews (1) Write a Review

        Overall Rating 4

        out of 5 stars

        • Fit 5 5
        • Bang For Your Buck 4 4



        • 4/5

          January 26, 2017

          Significant difference

          Got this to completely rehab a brake system on my yj and boy did it! Braking is now really noticeably better and quicker! Install went pretty well and quick but removal of the old one was a challenge

          Jking

          Year: 1989Submodel: Wrangler

          Helpful (18)

        Related Wrangler Categories