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I have 37s with stock brakes. 2018 JK 2-door.
What kit did you choose and why? I don't want to cheap out on this.
 

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I went with the Teraflex big rotor kit, and it's been great. It beefs up the pads and rotors but leaves the stock hydraulics. It made it an easy kit to install and it made a decent difference. Highly recommend.
 

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I went with the MOPAR BBK up front and the Teraflex kit on the rear.
MOPAR BBK: bigger booster, master cyl, discs & dual piston calipers up front
Teraflex: bigger discs but same OEM calipers & pads


I pull a mil-surplus trailer.
I like the added braking power over the stock setup.
 

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I got the Dynatrac big brake (rotors) kit because I wanted to improve both the front and rear, since the rear wears out so much quicker. And I didn't want to have to mess with the master cylinder or bleeding them.

Bedded them per instructions and they work awesome, stops very quick now. I can lock them up really easily if I want to. After putting in the Rubi t case it was nearly impossible to stop when going downhill in 4 low, but no problems now. I also pull and 2700 lb camper (dry weight) and didn't even notice when the trailer brakes went out on me once. For the record I'm on 37s with 4.56 gears.

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I also went with the Dynatrac kit. It is working great so far.
The main advantage to big brake kits is in the larger diameter rotors. That moves the contact point of the brake pads further out from the center of rotation, which increases the leverage the brakes have on stopping the rotor (and you). A second aspect is the larger diameter rotor has more mass and as such takes more heat to raise the temp of the rotor a given amount.
Kits that replace the calipers and / or master cylinders can offer a small amount more in braking improvement, but they can also change the feel of the brakes (not always for the better). Plus they are more expensive and more work to install.
I was torn between the TeraFlex kit(s) and the Dynatrac kit. I like that the Dynatrac kit is a one complete kit deal. And the quality of the kit seems top notch. I'm sure there are other good options, but I had no need for a kit that replaced the calipers (the stock calipers work fine) unless I was going to step up to an opposed piston caliper set up. And for that the price tag is way high. And putting all that work and money into a new caliper that is still a single sided caliper did not seem worth it to me. Running 37's really demanded better brakes. The Dynatrac kit resolved that issue for me.
 

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I have the Teraflex front big brake kit with slotted rotors. Stopping is great. On warm days I do get a vibration coming from them, I was told it’s because of the slotted rotors. Drives me nuts? Lol
 

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I got the Crown Auto RT31046 front big brake kit. Uses Ram truck 1 ton calipers. Been very satisfied with the braking.
Same along with the upgraded brake master cylinder and I did the teraflex rear big brake kit when I swapped in my rear CRD60 axle. Night and day difference over factory brakes.
 

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I added the Teraflex larger rotors and caliper relocation brackets to the front after I went to 35's. Braking seems to be about the same as the stock setup with 32's, which is much better than the stock rotors with the 35's, so I do not have any plans to add a different master cylinder or calipers, or do anything to the rears.

Only speculation, but IMO 37's would probably be better off with the larger rotors paired with the Ram 1 ton calipers.
 

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The Dynatrac kit is awesome. Running 37's the stock brakes were pretty horrible, put the Dynatrac in after reading a lot of reviews and I am super impressed by how easy the install was and how well they stop. Way better than stock on stock wheels.
 

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Crown RT31046 kit, Mopar Performance master cylinder and brake booster.

One of the best upgrades I have done.

I run KM3 37x12.5/R17's.
 

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I added the Teraflex larger rotors and caliper relocation brackets to the front after I went to 35's. Braking seems to be about the same as the stock setup with 32's, which is much better than the stock rotors with the 35's, so I do not have any plans to add a different master cylinder or calipers, or do anything to the rears.

Only speculation, but IMO 37's would probably be better off with the larger rotors paired with the Ram 1 ton calipers.
No need for different calipers....have you seen the size of those? And the rear brakes on bbk's are larger than the fronts so you should consider it since wranglers use ALOT of rear braking....
 

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You don't need a kit with a booster....I put the dynatrac on mine and love it.....you won't be disappointed....
Well, you may not think you need a larger booster, however, from my experience, on something 12 or older, you absolutely do.

I heard but cannot confirm that the 16+ have a larger booster, in that case, you won't need that part of the upgrade.

I ran both ways with the larger calipers, there is a noticeable difference in the ability to apply the brakes and the pedal feel.
 

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Well, you may not think you need a larger booster, however, from my experience, on something 12 or older, you absolutely do.

I heard but cannot confirm that the 16+ have a larger booster, in that case, you won't need that part of the upgrade.

I ran both ways with the larger calipers, there is a noticeable difference in the ability to apply the brakes and the pedal feel.
You are correct.....the 16+ do have the larger booster already....since he has an 18 that's why I said that....
 

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Well, you may not think you need a larger booster, however, from my experience, on something 12 or older, you absolutely do.


I ran both ways with the larger calipers, there is a noticeable difference in the ability to apply the brakes and the pedal feel.
You're saying this pertaining to the experience of only upgrading front rotors though, not both front and rear, right?

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I went with the Teraflex kit because at the time, that was really the only off the shelf kit available. Larger rotor in front, larger caliper, upgraded master cylinder. In the back, larger rotor and a caliper bracket to move the stock caliper out. It’s worked well for me for probably 6 or so years now.

If I were to make the mod today, I’d probably go with the Dynatrac kit because it’s cheaper and simpler. It uses the stock calipers and so doesn’t require any bleeding or changes to the master cylinder. You can also use stock pads once the Dynatrac pads wear out.

In any case, certainly for 37s, or even a JKU on 35s, I’d definitely recommend some kind of big brake kit.
 

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You're saying this pertaining to the experience of only upgrading front rotors though, not both front and rear, right?

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Right. As far as larger brakes, I only did the fronts using the Crown kit. The rears, I used a decent set of Powerstop semi ceramic pads on the stock rotors.

I have absolutely no problems stopping 37's while pulling a popup camper with this setup.
 

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You don't need a kit with a booster....I put the dynatrac on mine and love it.....you won't be disappointed....
Well, you may not think you need a larger booster, however, from my experience, on something 12 or older, you absolutely do.

I heard but cannot confirm that the 16+ have a larger booster, in that case, you won't need that part of the upgrade.

I ran both ways with the larger calipers, there is a noticeable difference in the ability to apply the brakes and the pedal feel.
I have a 2015 and no need for a booster with my dynatracs. On 37’s and brakes are like glue.
 

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I also got the Dynatrac system for the ease of installation and no messing around with the bleeding etc. I’m running mine on 33” with plans of lift and possibly bigger tires in the near future. What a difference in the braking! Stops on a dime! Took it on recent road trip loaded down with roof rack and a huge Akita (our road dog) and it performed like a champ. Very happy with this system.
 
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