- YJ Wrangler 2 Door - 87, 88, 89, 90
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$419.99 (kit)FREE Shipping
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.
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
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.
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.
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.
January 26, 2017
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
Bang for your Buck 4