Page 93 of K.A.R. Restomod Catalog by K.A.R. Auto Group

91 Order Toll Free 800-341-5949 FAX 614-294-5692 Dual Exhaust Conversion �e64 1/2 �e66 Many Mustang owners like either the appearance, sound, or added horsepower that dual exhaust provides over a single exhaust system. Perhaps all three factors are the motivation for this conversion. If this conversion is not performed correctly, it can result in brake failure. We, at K.A.R. Auto Group, have seen brake failure on several occa sions directly related to an early Mustang being converted from single to dual exhaust. When Ford Motor Company produced V-8 1964 1/2, 1965, and 1966 Mustangs with single exhaust, they installed the tail pipe on the pas senger side of the car. The rubber rear brake hose was installed on the driver�fs side of the car. The rear hose is attached to the axle housing and travels to a bracket that is mounted on the driver�fs side rear oor extension. The front to rear metal brake line enters the brake hose at this bracket. The end of the hose that is attached to the axle hous ing has a Y tting on this end. The rear metal brake lines screw into this tting and travel to each rear wheel completing the system. This works well on single exhaust early Mustangs. When Ford Motor Company produced 1964 1/2, 1965, and 1966 Mustangs with factory dual exhaust �gcompletely different�h front to rear metal brake line, rear axle metal brake lines, and rear ex brake hose were used. In addition, Ford relocated the ex hose mount ing bracket 8 to 10 inches further to the left side of the car. This new bracket mounting spot can easily be seen. It is near a stamping mark or embossed line in the oor. Why were all different metal lines and a different rear ex hose used on early dual exhaust Mustangs and the ex hose mounting bracket moved? The answer is to move the rubber ex hose away from the driver�fs side tail pipe. If dual exhaust is added and the rear ex hose is not relocated, it will in most cases rest on or extremely close to the tail pipe. Heat from the tail pipe will either melt this rubber hose or cause it to dry out and eventually rupture. Please note the arrows on these photos showing the proximity of the rubber brake line to the tail pipe. The car is on an overhead lift, so the rear suspension is lower than when the car is on the ground. When the car is sitting on the ground the rubber brake line rests on the tail pipe. Should this brake line fail all brakes will be lost instantly. The new metal rear axel brake lines, correct for a dual 66 Mustang, have been installed. The arrow indicates their The bracket for the rear brake rubber hose has been relocated the correct rubber hose for a dual exhaust car has been Note how this rubber hose is now permanently away from pipe and out of danger. This is now a factory correct and lation. 1964 1/2, 1965, and 1966 Mustangs were produced with single voir brake master cylinders. This simply means that these cars no backup brake system. If a brake uid drain occurred, the brakes at all four wheels. A ruptured line could cause this to occur virtually instantly. If you are considering converting your 1964 1/2, 1965, or tang to dual exhaust and you do not want to risk an we suggest you do the following: Relocate the rear ex hose mounting bracket. Change the front to rear metal brake line and the rear axle brake lines to lines speci cally produced for dual exhaust Change the rear ex hose to one speci haust Mustangs. Following steps 1 through 3 re ll the system with the proper uid and bleed all the air from the system. Insure you have brake pedal and no brake uid leaks before driving the car. 1967 AND LATER MUSTANGS There is no need to make any brake line changes to these when converting to dual exhaust. Ford Motor Company mounted brakes on these cars as though every car were to have K.A.R. Auto Group checks every early Mustang that we purchase dual exhaust brake line placement. If dual exhaust has been and the lines not replaced with correct dual exhaust lines hose mounting bracket not relocated, we make these changes the Mustang leaves our facility. If we service or repair a early Mustang, and we see this unsafe situation, we quickly customer to the danger. Knowledge Center

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