JK: Front Big Brake Kit w/ Slotted Rotors – 5x5” & 5x5.5”

SKU 4303420
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This item ships for free! (Continental U.S. only)

The TeraFlex JK/JKU Front Big Brake Kit is a must for JK Wrangler and JKU Wrangler Unlimited models requiring increased braking performance with oversized – and heavier – wheels and 33-35” tires. This simple bolt-on upgrade doesn’t require cutting, welding, or adapters.


• JK Wrangler (2-door)
• JKU Wrangler Unlimited (4-door)


• Brake calipers - pair
• Brake pads (# 4303430) - all 4
• Front driver slotted brake rotor (# 4303412)
• Front passenger slotted brake rotor (# 4303411)


• Improved braking performance over factory brake system
• Oversized 56mm (2.2”) dual-piston calipers for increased clamping force & surface area
• Larger 13.3” (338mm) rotors for superior stopping performance – stock is 11.9” (302mm)
• Slotted rotors offer better heat dissipation than smooth rotors
• Mill-balanced vented rotors for maximum heat dissipation
• Rotors feature dual bolt patterns – 5x5” & 5x5.5”
• Composite-resin, semi-metallic pads have excellent cold-stopping power for maximum initial speed scrub w/ increased pad life & reduce noise & dust
• 100% bolt-on upgrade for easy installation


• Requires a minimum of 17” diameter wheels.

• Front Big Brake Kit w/ standard brake rotors (# 4303400) also available.


Weight:  94.0 lbs

Vehicle Type:
JK Wrangler
JKU Wrangler Unlimited

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January 14th 2015
I put this big brake kit on my JKU and it stops my 40" Kevlar MTR's on a dime!!!
November 3rd 2016
Bobby Wade
Install is a breeze and materials are rock solid and built to last. My Jeep stops like a sports car now running on 35's.
February 28th 2017
Install was like any other brake job. They are a huge improvement over stock. Beware, they say minimum of 17" wheel. That leaves barely any clearance between the wheel and caliper for wheel weights. I had my newly balanced wheels have their weights ripped off after install. I recommend these brakes with at least 18" wheels.
December 1st 2018
Kent Foster
Found this kit after unending frustration with long stopping distances on my 2010 Jeep JK with 37 inch tires. While I did not do the install personally, my friends Darren and Travis said it was a smooth install. I would also recommend the big bore master cylinder for this year. Also replaced rear rotors with the big (non-slotted) rotors and used the factory brakes. The difference is well worth every penny and I can drive with confidence Very positive stopping power!