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- Drivetrain
- Brakes
- Brake Components >Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster
JK Automatic Transmission
Features & Product Details
Have you swapped in the Mopar Big Brake kit (#77072434), one of those super trick TeraFlex Delta brake kits (#4403450) or some other brake kit needing more fluid? If so, the Mopar J8 Master Cylinder and Brake Booster kit is for you!
Jeep Jk Mopar J8 Master Cylinder & Brake Booster Features:Specifications
Brand:
Mopar
Type:
Master Cylinder
Mfgr. Warranty:
No Warranty
Condition:
New Product
Return Policy:
Standard
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REVIEWS & CUSTOMER MEDIA
Customer Photos and Videos
No user media. You can upload a photo or video of your install by posting a review.
Needed for Teraflex Delta Kit Install 10 months ago
I foolishly ordered this from a lessor online vendor in hopes of saving ~$40. I was on back order for over a year before I decided to place a 2nd order with Northridge to see which order came in 1st. Northridge clearly stated the item was on backorder but I still received it in about 70 days. Never received the 1st order from other vendor and cancelled about 2 months ago. Still waiting on my refund check. Northridge is more transparent and treat's it's customers fairly. The product is what it is but Northridge is top notch.
Was this review helpful?
4out of
5stars
ARAYCPA
I foolishly ordered this from a lessor online vendor in hopes of saving ~$40. I was on back order for over a year before I decided to place a 2nd order with Northridge to see which order came in 1st. Northridge clearly stated the item was on backorder but I still received it in about 70 days. Never received the 1st order from other vendor and cancelled about 2 months ago. Still waiting on my refund check. Northridge is more transparent and treat's it's customers fairly. The product is what it is but Northridge is top notch.
2 of 2 people found the following review helpful
Works wonderfully 2 years ago
5out of
5stars
Brandon
I installed a Grow big brake kit only to realize that was a useless upgrade with out a larger booster/master upgrade. Install is a big pain but a competent DIYer should have no problem with. I installed this in a manual trans with a Wilwood remote res, Evo compressor mount and ARB High Output Single, it all fits
Will need a custom bent brake line for 2018 Jeep JKU. 2 years ago
Everything was going great until it came time to re-attach the factory brake lines. 1 line fit perfectly and the other one was off 1 3/4in.
Was this review helpful?
4out of
5stars
IndioN8
Everything was going great until it came time to re-attach the factory brake lines. 1 line fit perfectly and the other one was off 1 3/4in.
J8 brake booster install. 2 years ago
I installed this in my JK with the intention of adding a big brake kit. To install I had to separate the cylinder from the booster as it would not slide in together, removal of the ABS hydraulic unit was not necessary. If the cylinder isn't installed straight on the rod it will bend the rod or ruin the piston inside the cylinder. 2 steel lines to the unit did have to be rebent to fit the cylinder as it is 1 and 1/4 or 1/2 inches longer than the stock assembly. I bled it by installing the assembly and routing the lines back into the reservoir and using the brake pedal. I did not want to deal with a vice and screwdriver to bench bleed. I did a complete brake overhall with Teraflex Delta brake kit as well as added steel braided lines so overall braking performance increased.
Was this review helpful?
5out of
5stars
JKJV
I installed this in my JK with the intention of adding a big brake kit. To install I had to separate the cylinder from the booster as it would not slide in together, removal of the ABS hydraulic unit was not necessary. If the cylinder isn't installed straight on the rod it will bend the rod or ruin the piston inside the cylinder. 2 steel lines to the unit did have to be rebent to fit the cylinder as it is 1 and 1/4 or 1/2 inches longer than the stock assembly. I bled it by installing the assembly and routing the lines back into the reservoir and using the brake pedal. I did not want to deal with a vice and screwdriver to bench bleed. I did a complete brake overhall with Teraflex Delta brake kit as well as added steel braided lines so overall braking performance increased.
1 of 1 people found the following review helpful
Mopar BBK is the answer you are looking for... 3 years ago
5out of
5stars
Jcs2179
If you have finally decided to upgrade your factory Jeep Wrangler brakes to handle the extra weight of that suspension upgrade, the bigger wheels, heavier tires, bulky roof rack, winch, fridge, and bumpers, you have no doubt purchased one of the good quality kits from the Usual Suspects. None of the kits however, tells you about the soft/mushy pedal you'll get as a direct result of the bigger volume of brake fluid you will be pushing through the system, but with nowhere to pull this precious resource from. Its just simply not there. The kits mention nouns like might, maybe, sometimes, but the real deal is if you want those expensive upgraded brakes you just bought to perform their best, you MUST get this kit. The reservoir is much bigger, the M/C has bigger bore size to pass more fluid through, and the bigger brake booster...well, it boost!! Its instant stopping power. A word of caution: you must bench bleed the M/C prior to installation, and the kit does not fit if you've installed the ARB dual/single compressor and braket under the hood. The Mopar BBK kit is dimple a bit bigger and it won't fit.
QUESTIONS & ANSWERS
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Q: J8 gone the way of the dodo bird? JkRL1 year ago
Are these ever going to come back into stock or is heep just going to continue to yank our chain? -
-
1 of
1 people found the
following answer helpful
A: We will see them again, just unsure as to when that will be.
Northridge Chris @ Northridge4x4 1 year ago
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1 of
1 people found the
following answer helpful
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Q: MOPAR J8 MASTER CYLINDER AND BRAKE BOOSTER Josh1 year ago
Is there an alternative part that will work for a JK with a manual transmission? -
-
0 of
0 people found the
following answer helpful
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 1 year ago
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0 of
0 people found the
following answer helpful
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Q: J8 booster and MC FIREBALL2 years ago
Will this fit a 2018 Wrangler JLU automatic? -
-
0 of
0 people found the
following answer helpful
A: This is JK specific.
Northridge Chris @ Northridge4x4 2 years ago
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0 of
0 people found the
following answer helpful
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Q: 2012 jk auto Blakebb22 years ago
Will this product fit my vehicle -
-
0 of
0 people found the
following answer helpful
A: Yes, this will work for your 2012 JK auto, without issue.
Northridge Chris @ Northridge4x4 2 years ago
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0 of
0 people found the
following answer helpful
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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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0 of
0 people found the
following answer helpful
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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0 of
0 people found the
following answer helpful
This Part Fits
Jeep Wrangler JK
70th Anniversary
2011 Jeep Wrangler JK 70th Anniversary
Altitude
2018 Jeep Wrangler JK Altitude
Freedom Edition
2018 Jeep Wrangler JK Freedom Edition
Islander
2010 Jeep Wrangler JK Islander
Mountain
2010 Jeep Wrangler JK Mountain
Rubicon
2007 Jeep Wrangler JK Rubicon
2008 Jeep Wrangler JK Rubicon
2009 Jeep Wrangler JK Rubicon
2010 Jeep Wrangler JK Rubicon
2011 Jeep Wrangler JK Rubicon
2012 Jeep Wrangler JK Rubicon
2013 Jeep Wrangler JK Rubicon
2014 Jeep Wrangler JK Rubicon
2015 Jeep Wrangler JK Rubicon
2016 Jeep Wrangler JK Rubicon
2017 Jeep Wrangler JK Rubicon
2018 Jeep Wrangler JK Rubicon
Rubicon Recon
2017 Jeep Wrangler JK Rubicon Recon
2018 Jeep Wrangler JK Rubicon Recon
Sahara
2007 Jeep Wrangler JK Sahara
2008 Jeep Wrangler JK Sahara
2009 Jeep Wrangler JK Sahara
2010 Jeep Wrangler JK Sahara
2011 Jeep Wrangler JK Sahara
2012 Jeep Wrangler JK Sahara
2013 Jeep Wrangler JK Sahara
2014 Jeep Wrangler JK Sahara
2015 Jeep Wrangler JK Sahara
2016 Jeep Wrangler JK Sahara
2017 Jeep Wrangler JK Sahara
2018 Jeep Wrangler JK Sahara
Sport
2010 Jeep Wrangler JK Sport
2011 Jeep Wrangler JK Sport
2012 Jeep Wrangler JK Sport
2013 Jeep Wrangler JK Sport
2014 Jeep Wrangler JK Sport
2015 Jeep Wrangler JK Sport
2016 Jeep Wrangler JK Sport
2017 Jeep Wrangler JK Sport
2018 Jeep Wrangler JK Sport
Sport S
2016 Jeep Wrangler JK Sport S
2017 Jeep Wrangler JK Sport S
2018 Jeep Wrangler JK Sport S
Unlimited
2012 Jeep Wrangler JK Unlimited
Unlimited 70th Anniversary
2011 Jeep Wrangler JK Unlimited 70th Anniversary
Unlimited Altitude
2012 Jeep Wrangler JK Unlimited Altitude
2018 Jeep Wrangler JK Unlimited Altitude
Unlimited Freedom Edition
2018 Jeep Wrangler JK Unlimited Freedom Edition
Unlimited Hard Rock
2015 Jeep Wrangler JK Unlimited Hard Rock
Unlimited Islander
2010 Jeep Wrangler JK Unlimited Islander
Unlimited Mountain
2010 Jeep Wrangler JK Unlimited Mountain
2012 Jeep Wrangler JK Unlimited Mountain
Unlimited Rubicon
2007 Jeep Wrangler JK Unlimited Rubicon
2008 Jeep Wrangler JK Unlimited Rubicon
2009 Jeep Wrangler JK Unlimited Rubicon
2010 Jeep Wrangler JK Unlimited Rubicon
2011 Jeep Wrangler JK Unlimited Rubicon
2012 Jeep Wrangler JK Unlimited Rubicon
2013 Jeep Wrangler JK Unlimited Rubicon
2014 Jeep Wrangler JK Unlimited Rubicon
2015 Jeep Wrangler JK Unlimited Rubicon
2016 Jeep Wrangler JK Unlimited Rubicon
2017 Jeep Wrangler JK Unlimited Rubicon
2018 Jeep Wrangler JK Unlimited Rubicon
Unlimited Rubicon Recon
2017 Jeep Wrangler JK Unlimited Rubicon Recon
2018 Jeep Wrangler JK Unlimited Rubicon Recon
Unlimited Sahara
2007 Jeep Wrangler JK Unlimited Sahara
2008 Jeep Wrangler JK Unlimited Sahara
2009 Jeep Wrangler JK Unlimited Sahara
2010 Jeep Wrangler JK Unlimited Sahara
2011 Jeep Wrangler JK Unlimited Sahara
2012 Jeep Wrangler JK Unlimited Sahara
2013 Jeep Wrangler JK Unlimited Sahara
2014 Jeep Wrangler JK Unlimited Sahara
2015 Jeep Wrangler JK Unlimited Sahara
2016 Jeep Wrangler JK Unlimited Sahara
2017 Jeep Wrangler JK Unlimited Sahara
2018 Jeep Wrangler JK Unlimited Sahara
Unlimited Sport
2010 Jeep Wrangler JK Unlimited Sport
2011 Jeep Wrangler JK Unlimited Sport
2012 Jeep Wrangler JK Unlimited Sport
2013 Jeep Wrangler JK Unlimited Sport
2014 Jeep Wrangler JK Unlimited Sport
2015 Jeep Wrangler JK Unlimited Sport
2016 Jeep Wrangler JK Unlimited Sport
2017 Jeep Wrangler JK Unlimited Sport
2018 Jeep Wrangler JK Unlimited Sport
Unlimited Sport S
2016 Jeep Wrangler JK Unlimited Sport S
2017 Jeep Wrangler JK Unlimited Sport S
2018 Jeep Wrangler JK Unlimited Sport S
Unlimited Willys Wheeler
2014 Jeep Wrangler JK Unlimited Willys Wheeler
2018 Jeep Wrangler JK Unlimited Willys Wheeler
Unlimited Willys Wheeler W
2018 Jeep Wrangler JK Unlimited Willys Wheeler W
Unlimited X
2007 Jeep Wrangler JK Unlimited X
2008 Jeep Wrangler JK Unlimited X
2009 Jeep Wrangler JK Unlimited X
2010 Jeep Wrangler JK Unlimited X
2011 Jeep Wrangler JK Unlimited X
Willys Wheeler
2014 Jeep Wrangler JK Willys Wheeler
2018 Jeep Wrangler JK Willys Wheeler
Willys Wheeler W
2018 Jeep Wrangler JK Willys Wheeler W
X
2007 Jeep Wrangler JK X
2008 Jeep Wrangler JK X
2009 Jeep Wrangler JK X
2010 Jeep Wrangler JK X
X-S
2009 Jeep Wrangler JK X-S