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The Alcon BKF1551K06 Front Big Brake Kit brings motorsports-grade stopping power to 2018+ Jeep Wrangler JL and 2020+ Gladiator JT models running Dana 44 axles with 5x5" hubs. Six-piston ductile iron calipers finished in a high-temperature red epoxy clamp down on 350x32mm vented rotors, delivering up to 14% less disc temperature rise, up to 35% lower pad work rate, and up to 10% reduction in pedal effort compared to the factory setup. The kit retains full compatibility with your stock master cylinder, ABS, and parking brake, and is engineered to clear OEM and most aftermarket 17-inch and larger wheels.
Key Features
- 6-piston red Alcon calipers machined from ductile iron for maximum stiffness and impact resistance
- 350x32mm vented, high-mass rotors for increased thermal capacity and fade resistance
- Up to 14% reduction in disc temperature rise over stock brakes
- Up to 35% reduction in pad work rate for longer pad life
- Up to 6% increase in available brake torque and up to 10% reduction in pedal effort
- High-friction brake pads with enlarged surface area for consistent bite
- Epoxy acrylic paint over acid zinc caliper finish for maximum corrosion protection
- Fully plug-and-play with factory ABS, master cylinder, and parking brake — no modifications required
Fitment
| Years | Make | Model | Submodel / Notes |
|---|---|---|---|
| 2018-2025 | Jeep | Wrangler JL | All (Dana 44, 5x5" hub) |
| 2020-2025 | Jeep | Gladiator JT | All (Dana 44, 5x5" hub) |
Specifications
| Brand | Alcon |
|---|---|
| Manufacturer Part Number | ALABKF1551K06 |
| Product Type | Big Brake Kits |
| Condition | New |
| Axle Position | Front |
| Rotor Size | 350mm x 32mm, vented |
| Caliper | 6-piston, ductile iron, red finish |
| Caliper Part Numbers | CIR1551K07HZLT-RL (left), CIR1551K07HZRT-LL (right) |
| Rotor Part Numbers | DIV3430X1022C24L (left), DIV3430X1022C24R (right) |
| Bracket Kit | BSK4415X600 (x2) |
| Pads | PNS4415X511 (set of 4) |
| Banjo Bolts | BSH3430X1150 (x2) |
| ABS Compatible | Yes |
| Parking Brake Compatible | Yes |
| Sold As | Complete front axle kit |
| Warranty | Limited 12 month / 12,000 mile Alcon Components Ltd. warranty against defects in materials and workmanship |
What's Included
- 1 left 6-piston caliper (CIR1551K07HZLT-RL)
- 1 right 6-piston caliper (CIR1551K07HZRT-LL)
- 1 left vented rotor, 350x32mm (DIV3430X1022C24L)
- 1 right vented rotor, 350x32mm (DIV3430X1022C24R)
- 2 caliper mounting bracket kits (BSK4415X600)
- 1 set of 4 high-friction brake pads (PNS4415X511)
- 2 banjo bolts with crush washers (BSH3430X1150)
About Alcon
Alcon engineers performance brake systems and service components for road, off-road, motorsport, defense, and specialized vehicle applications. Exact caliper, rotor, pad, hardware, fitment, and clearance requirements vary by part number.
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- Shop the complete Alcon collection
Frequently Asked Questions
Will Alcon ALABKF1551K06 fit my vehicle?
This kit is listed for 2018-2025 Jeep Wrangler JL All (Dana 44, 5x5" hub), 2020-2025 Jeep Gladiator JT All (Dana 44, 5x5" hub). Confirm the complete trim, factory brake package, hub and knuckle configuration, and every application note before ordering.
What is included with Alcon ALABKF1551K06?
The verified package includes 1 left 6-piston caliper (CIR1551K07HZLT-RL); 1 right 6-piston caliper (CIR1551K07HZRT-LL); 1 left vented rotor, 350x32mm (DIV3430X1022C24L); 1 right vented rotor, 350x32mm (DIV3430X1022C24R); 2 caliper mounting bracket kits (BSK4415X600). Only components explicitly listed for this exact part number are included.
Which axle does this Alcon brake kit upgrade?
This configuration is for the axle position stated in the product title and specifications. Do not substitute a front, rear, or complete-vehicle kit with a similar rotor diameter.
Will my current wheels clear this Alcon brake kit?
Wheel diameter alone does not establish clearance. Verify spoke profile, barrel diameter, offset, caliper envelope, rotor size, and the current Alcon wheel-clearance template before ordering.
Does an Alcon big brake kit require bleeding and bedding?
Hydraulic brake work requires correct installation, bleeding, leak inspection, torque verification, and the pad and rotor bedding procedure supplied for the exact components. Professional installation is recommended when the installer is not qualified for brake-system service.
Installation Instructions
- Raise the vehicle, engage the parking brake, and remove both front wheels
- Loosen the factory brake line fitting at the caliper and cap it to minimize fluid loss
- Remove the OEM caliper, bracket, and rotor from each side
- Clean the hub face and mount the new BSK4415X600 bracket using OEM hardware torqued to factory spec
- Install the new 350x32mm rotor onto the hub, confirming correct left/right rotor placement
- Load the PNS4415X511 pads into the caliper and install the caliper onto the bracket
- Torque caliper mounting bolts to Alcon's specified torque value
- Connect the new banjo bolt and brake line fitting with new crush washers
Important Disclosures
- California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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