Thoughts on the Mopar J8 Brake Booster & Master Cylinder

MAG00

MAG00

Member
I am in the process of doing a 6.2 swap into my '13 JKU. My rig is on the heavy side, running heavy 37s (Nitto TG on Spyderlok wheels) with Currie 60s. Any opinions on upgrading to a larger brake booster and master cylinder like the Mopar J8? If I do it, now is the time. Is it worth the added expense...any real upside to it?

I've read that the 12-18 JK had a bigger unit than the 07-11 JK. Will this unit be a big enough improvement to warrant the costs and install?
 
MAG00 said:
I am in the process of doing a 6.2 swap into my '13 JKU. My rig is on the heavy side, running heavy 37s (Nitto TG on Spyderlok wheels) with Currie 60s. Any opinions on upgrading to a larger brake booster and master cylinder like the Mopar J8? If I do it, now is the time. Is it worth the added expense...any real upside to it?

I've read that the 12-18 JK had a bigger unit than the 07-11 JK. Will this unit be a big enough improvement to warrant the costs and install?
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I have a 2010 6.2 PR 60’s on 37’s bead-locks etc. stock booster and master cylinder I’ve got no issues or complaints with how it stops .
 
After installing DXD60’s I didn’t like the feel of the stock breaks with 37’s so I upgraded to the Mopar J8 break booster. Brought the break feel back to stock with my heavy 2016 JKUR.


Sent from my iPhone using WAYALIFE
 
I upgraded to the J8 with the 1 ton axle upgrade and 40s. It increases the diaphragm size and Rez capacity which the larger calipers need to hold either on a fast stop or on a ledge holding back the weight of from coming down hard. In my opinion, it is 100% necessary and a safety issue with these bigger built Jeeps.


2015 JKUR AEV JK350
1985 CJ8 Scrambler
 
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Seahawkfan said:
Looks like you might run into some backorder issues.

https://www.moparamerica.com/oem-pa...-j8-quot-master-cylinder-booster-kit-p5160050

Edit: Check out Qtec, Says in stock. But we all know how that's playing out. The Mopar link says nation wide backorder.
https://www.quadratec.com/p/mopar/brake-master-cylinder-booster-jk-dana-60-axle-P5160050
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MericaMade said:
Haha lol my luck! Thanks for the link.

Sent from my SM-G996U using WAYALIFE mobile app
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There still might be hope. LOL
 
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