hey what's up everybody i'm Landan with lmr.com in this video we're going to be removing a factory 93
cobra style brake booster and installing a 5.0 resto 93 cobra style brake booster
now i'll be the first to tell you installing a 93 cobra style booster into a fox mustang
isn't the most fun thing to do because of the overall physical size of the 93 cobra
style booster but it's one of those things it is what it is also instead of going down
the rabbit hole and explaining the differences between the two boosters this video is going
to be focused on factory booster removal and 93 cobra style booster installation
if you want to know more about a 93 cobra style booster please check out the review video
in the description so depending on what you're doing with your car will dictate
how the installation process goes either going to be in the middle of upgrading rotors and calipers
whether it be to a four lug rear disc or a five lug sn95 front and rear setup and installing a
new master cylinder or you're going to be like us where everything is already installed and in place
and all you're doing is installing a 93 cobra style booster regardless of where you're at
this video will help provide a very detailed explanation of booster removal and 93 cobra
style booster installation for what it's worth we will be working with our 93 silver hatchback so
a few of these steps will differ depending on the year range of your fox mustang in order to remove
the factory booster from the car you'll need to first flip the driver's side of the vehicle
to gain access to the half inch nut that retains the factory proportioning valve to the strut tower
reach into the wheel well with a half inch socket and wrench to loosen and remove the nut
let's move inside now there are a few different ways to go about removing the booster to firewall
retaining nuts because of the location of the hardware you can either use an assortment of
tools to remove all four of the retaining nuts or remove the lower dash trim so you
can insert a long extension and a 9/16 socket whichever route you take i would recommend that
you remove the seat for optimal working room go ahead and remove all four of the retaining nuts
remove the cotter pin and spacer using a small pry bar or flat head screwdriver remove the
brake light switch from the pedal go ahead and carefully remove the actuator rod from the pedal
inside the engine bay disconnect the electrical connection on the master cylinder and feed it
through towards the fender i would also take this opportunity to disconnect any other electrical
connection or component in this general area and position them out of the way as best you can
carefully remove the check valve from the booster and reposition the hose locate the two master
cylinder to brake booster retaining nuts loosen and remove both of these nuts with a 9/16 wrench
now that these are loose work the stud and the locating tab on the factory proportioning valve
out of the strut tower next carefully and methodically remove the master cylinder from
the studs on the booster before you tilt the assembly towards the front of the car
make sure the cap is tight on the master cylinder so brake fluid doesn't leak out
go ahead and reposition the master cylinder toward the front of the car bring the booster
away from the firewall because of the limited space rotate and shift the booster as needed
to free the studs from the firewall and then remove the booster from the car
whenever the booster is removed take this time to clean the surrounding area
now we can install the 93 cobra style booster before this happens you must verify
and adjust the brake booster push rod length we've set aside a separate video for that so
please go watch it first and then come back over to this video to finish your install
whenever the booster rod is adjusted we'll need to modify the vehicle to accept the larger booster
these modifications include elongating the four holes in the firewall as well as clearancing the
strut tower i have also found that removing the bolt securing the clutch cable bracket
to the frame rail helps with pushing the cable over when positioning the booster
i would recommend that you start with elongating the holes in the firewall first and then test fit
the booster before clearancing the strut towel for reference purposes we show a dead blow hammer
but depending on how much clearancing is needed you may need to use something with a little more
emphasis if you know what i mean whatever you do use all means necessary to ensure that you
don't damage the painted surface position the booster into place this particular car here
cleared the strut tower but it did need a little persuasion to get past the holes in the firewall
a couple of light taps for the frontward facing studs help coax the booster into place
install the master cylinder onto the studs in the front of the booster
reposition the factory proportioning valve into the strut tower
use the provided nuts and install them onto the booster tighten down both nuts using a 9/16 wrench
reconnect the vacuum line to the check valve on the new booster reroute and connect any
electrical connection or component that was disconnected or repositioned in this area
reinstall the clutch cable bracket if it was relocated and tighten the
retaining bolt from within the fender well reinstall and tighten the retaining nut
for the factory proportioning valve safely lower the vehicle
install the provided bushing into the actuator rod on the new booster position the actuator rod
onto the brake pedal reinstall the brake light switch spacer and cotter pin reinstall the four
previously removed brake booster to fire wall retaining nuts and tighten them down if
you removed any interior components go ahead and reinstall these pieces reinstall the driver's seat
and the hardware at this point you're either going to finish the rest of your brake component upgrade
and then check everything or go ahead and start the car move it forward under its own power and
make sure the brakes function as they should after that you're good to go all right folks you did it
you installed a 93 cobra style booster into your fox mustang if for some reason you may have a few
questions give us a shout we'll be happy to hear from you and of course we'll steer you in the
right direction as always if you appreciate our installation videos hit the like button
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notified every time we release something new we're signing off so we'll catch you in the next one
you know what to do for all things Fox Body keep it right here with the real enthusiasts LMR.com