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. 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.
RT31010 will fit CJ's w/ manual brakes. The link below shows a factory CJ with manual brakes. The 4-bolt pattern is pre-drilled into the firewall.
from 4WP Corporate Headquarters
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