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Q: J8 gone the way of the dodo bird? JkRL2 years ago
Are these ever going to come back into stock or is heep just going to continue to yank our chain? -
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A: We will see them again, just unsure as to when that will be.
Northridge Chris @ Northridge4x4 2 years ago
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Q: MOPAR J8 MASTER CYLINDER AND BRAKE BOOSTER Josh2 years ago
Is there an alternative part that will work for a JK with a manual transmission? -
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A: You can still use this with a manual transmission, you'll just need to source a reservoir for the clutch, such as a Wilwood one..
Northridge Chris @ Northridge4x4 2 years ago
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Q: J8 booster and MC FIREBALL3 years ago
Will this fit a 2018 Wrangler JLU automatic? -
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A: This is JK specific.
Northridge Chris @ Northridge4x4 3 years ago
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Q: 2012 jk auto Blakebb23 years ago
Will this product fit my vehicle -
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A: Yes, this will work for your 2012 JK auto, without issue.
Northridge Chris @ Northridge4x4 3 years ago
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Q: Compatibility with 2014 JKU jespersen703 years ago
I have a 2014 JKU and I installed a Teraflex front big brake kit, I would like to install the Mopar J8 master cylinder and brake booster but it says it’s not compatible with 2014 only 2015 to 2018. Why is this kit not compatible with 2014? What is different and can I make it work? Thank you -
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A: As long as you have an automatic, this will work for you without any issues.
Northridge Chris @ Northridge4x4 3 years ago
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Q: J8 booster / master cylinder with synergy bracket Collin4 years ago
Will this work with the synergy compressor bracket and single (small) ARB compressor -
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A: This will not work with the Synergy compressor bracket. You have to relocate that in order to use the bigger brake booster system.
Northridge Chris @ Northridge4x4 4 years ago
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Q: J8 MC +Booster with powerstop? prestonseaver4 years ago
Will this kit work with the powerstop factory replacement sized calipers, or will the pedal not feel right since the calipers are not as big as the BBK? -
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A: Yes, this will improve your braking.
Northridge Chris @ Northridge4x4 4 years ago
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Q: Order separately? Derek 4 years ago
I am thinking about upgrading my master cylinder to the Teraflex option, so I wanted to know if the other two parts offered in this bundle can be ordered separately? -
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A: No they can not.
Northridge Kaleb @ Northridge4x4 4 years ago
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Q: Manual transmission O.H.4 years ago
Is it possible to be install on a manual transmission by just keeping the original brake fluid reservoir? -
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A: The new master cylinder in this kit doesn't have a port for the clutch line. You have to run a different clutch fluid reservoir. The Wilwood 26011098 has been used by others with success(we don't carry it, however).
Northridge Kaleb @ Northridge4x4 4 years ago
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Q: Arb compressor Bguerrero5 years ago
Will the small arb air compressor with mount, that mounts on the firewall still work with this Booster? -
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A: Yes, the EVO bracket has been used with the J8 Master/Booster combo, for the ARB single compressor. https://www.northridge4x4.com/part/compressor-mounts-accessories/1097-evo-manufacturing-air-compressor-mount-kit
Northridge Kaleb @ Northridge4x4 5 years ago
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Q: J* Booster Scott5 years ago
I read on here that there my not be a plugin for the elec on the J8 booster? I have a 2015 and wondering if that will be an issue? If so what can I do to rectify any dash lights/error codes -
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A: It's for the check valve. You should pull the one out of your stock booster and place it in to the new booster.
Northridge Kaleb @ Northridge4x4 5 years ago
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Q: Check valve KingKrawler5 years ago
The check valve on this booster is different than the one on my 2012 JKU. It does not have the electrical plugin on it that the stock one has. So should the electrical plugin just be left unplugged after installing the new booster or should the check valve from the old stock booster be swapped over to the new J8 booster and then the electrical plug connected? -
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A: You should swap the check valve from the original booster to the new and discard the one that comes with the kit.
Northridge Kaleb @ Northridge4x4 5 years ago
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Q: Soft Brake Pedal Jcurrent6 years ago
I have this booster/master with crown big brake kit up front, and tereflex big roter kit in rear I ordered from you. Everything is installed, ABS was bled, and the system was bled 3 times. I still have a soft pedal and it takes up a lot prior to brakes engaging. Does the booster on the JK8 have an adjustable push rod? -
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A: The booster does not have an adjustable push rod. We haven't had any soft pedal issues after installing these master/booster kits. Only thing that comes to mind, that you didn't mention, is that the master needs to be bench bled before install.
Northridge Kaleb @ Northridge4x4 6 years ago -
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A: I am having the same issue. I'm on my second kit and same problem. No amount regular + ABS bleeding has been able to solve it. Both my boosters had an adjustable pushrod but seemed to be set at the right length out of the box. My setup is using brand new 14blt callipers in the back and brand new SD60 callipers up front.
Steve @
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