Overview
The TeraFlex 4303420 is a front JK big brake upgrade kit with twin-piston calipers and 13.3-inch mill-balanced slotted rotors for the Jeep Wrangler JK, 2-door and 4-door.
The oversize twin-piston caliper adds clamping force with increased pad area and helps reduce brake fade. It is a front big brake kit for the Jeep Wrangler JK. Confirm fit for your vehicle’s year, model and trim before ordering.
About this part
Slots in the rotor give brake gas and debris a path out and help keep the pad face clean, though they wear pads a little faster than plain rotors. The calipers, pads and e-coat finish match the standard rotor version. The 5 x 4.5 and 5 x 5.5 lug pattern is drilled into the rotor, so the kit works with more than one wheel pattern.
Key features
- Oversize twin-piston calipers
- 13.3-inch mill-balanced slotted rotors
- Dual drilled lug pattern, 5 x 4.5 and 5 x 5.5
- Premium e-coat finish that resists rust (per TeraFlex)
- High performance composite-resin, semi-metallic pads
- Fits 2-door and 4-door models
- Direct fit
Slotted vs. plain rotors
Slotted rotors are a common choice on trail rigs because the slots help keep the pad surface clear of mud, dust and gas. A clean pad face keeps bite more consistent when the brakes get wet or dirty. The trade-off is that slots produce a bit more pad wear, so pad changes may come sooner than with a plain rotor.
When comparing rotor types, look at how the vehicle is used. Daily driving on pavement may not need the extra clearing effect, while frequent off-road use often does. Pick the rotor style that matches your driving, then keep the pads and rotor faces in good condition so the brakes perform as expected.
- Slots help clear debris from the pad face
- Expect slightly faster pad wear
- Match rotor style to how the vehicle is driven
Specifications
| Brand | TeraFlex |
|---|---|
| Part number | 4303420 |
| UPC | 843885003052 |
| Product type | Front big brake upgrade kit with slotted rotors |
| Caliper | Twin piston, aftermarket |
| Rotor diameter | 13.3 inches |
| Rotor type | Slotted, mill-balanced |
| Lug pattern | Dual drilled: 5 x 4.5 and 5 x 5.5 |
| Pads | Composite-resin, semi-metallic, high performance |
| Finish | E-coat |
| Color | Natural |
| Body styles | 2-door and 4-door |
| Fitment type | Direct fit |
Vehicle fitment
The kit is a front JK Big Brake kit for the Jeep Wrangler (JK) generation. Confirm fit for your vehicle’s year, model and trim before ordering.
The JK designation does not cover the TJ, LJ or JL Wrangler. Confirm fit for your vehicle’s year, model and trim before ordering.
What’s included
Twin-piston calipers, 13.3-inch mill-balanced slotted rotors and high performance brake pads, per the kit description.
Not included: Brake hoses and brake fluid are not part of this kit.
