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Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission
Mopar J8 Master Cylinder and Brake Booster - JK Automatic Transmission

Mopar J8 Master Cylinder and Brake Booster

JK Automatic Transmission

Read 2 Reviews | 6 Q&As
Part # P5160050
$379.99

In stock!

Features & Product Details

High performance master cylinder and booster kit for those big brake swaps!

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!

Big 1-1/8 inch master cylinder bore.

Same OEM parts included in Mopar's Big Brake Kit (P5160051).

*Fits automatic transmission only

*Does not fit with underhood ARB twin compressor mount

 

***THIS IS A MOPAR PERFORMANCE PART AND IS SOLD AS IS, THIS PART CARRIES NO WARRANTY FROM MOPAR

Specifications

Brand: Mopar
Type: Master Cylinder
Mfgr. Warranty: No Warranty
Condition: New Product
Return Policy:
Standard

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REVIEWS & CUSTOMER MEDIA

2 Reviews
5 out of 5 Stars
5 Stars
(2)
4 Stars
(0)
3 Stars
(0)
2 Stars
(0)
1 Stars
(0)
Customer Photos and Videos
No user media. You can upload a photo or video of your install by posting a review.
1 of 1 people found the following review helpful
'14 Rubi w/ J8 4 months ago
5out of 5stars

I installed UD60's on my '14 JK Rubi, the brake rotors and calipers on the UD60's are huge and I wanted to make sure the mc and brake booster were adequate for the massive brakes. After installing the new mc and brake booster I couldn't get the brake pedal to firm up. I bled the brakes every way possible and had the anti lock module bled as well and yet the brake pedal would continue to go all the way to the floor. I contacted Northridge 4x4 and they sent me a replacement mc and brake booster right away. The first kit that was sent didn't have a new seal with it, that goes between the mc and brake booster. I was instructed to use the oem seal which I did, and would later determine that that's what was causing the issue. The second kit that was sent did indeed have a new seal, after installing that kit, the brakes are better than when the jeep was new. Aside from the snafu with no seal being with the first kit, this setup is fantastic.
  
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4 of 4 people found the following review helpful
Works Great, Tough to Install 1 year ago
5out of 5stars

The J8 master cylinder and brake booster from MOPAR works really well. I paired it with a big brake kit (larger rotors and calipers) and my braking feels much better. I can lock up my 37" tires on a 4-door just fine now. I couldn't before. The pedal feel is also much improved. The build of each part seems good (they are MOPAR, not an aftermarket manufacturer). The performance per dollar is also good. The inclusion of the booster for this price is good. Also, the master cylinder has a larger bore than some of the competitors that don't include a larger booster. Installing the brake booster and master cylinder was difficult. The included instructions has you install the brake booster on the firewall bracket, then install the booster + bracket on the Jeep, then install the master cylinder. I found it much easier to install the bracket in the Jeep alone, install the master cylinder on the brake booster, then install the booster + master on the bracket together. This will force you to fasten the bolts of the booster inside the cab where the brake pedal is. The trade off is that it's much easier to move the booster + master in place this way. In fairness, replacing a brake booster is always a pain and isn't specific to this kit.
  
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QUESTIONS & ANSWERS

  • Q: Order separately?  Derek 16 days 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?
  • Q: Manual transmission   O.H.3 months ago

    Is it possible to be install on a manual transmission by just keeping the original brake fluid reservoir?
    • 0 of 0 people found the following answer helpful

      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 3 months ago  
        
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  • Q: J* Booster  Scott6 months 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
    • 1 of 1 people found the following answer helpful

      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 6 months ago  
        
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  • Q: Check valve  KingKrawler6 months 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?
    • 0 of 0 people found the following answer helpful

      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 6 months ago  
        
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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