TeraFlex 4403480 Delta Brake System Front & Rear 14-Inch Rotors 8x6.5 Bolt Pattern

The TeraFlex Delta Brake System (4403480) is a complete front and rear big brake upgrade engineered for Jeep Wrangler JL, JLU, JK, JKU, and JT Gladiator builds running oversized, heavier wheel and tire combinations. Designed specifically for rigs equipped with 33–42 inch tires or heavily loaded overland setups, this all-inclusive kit replaces both axle brake assemblies with a dramatic step up in stopping power over the factory system.

At the heart of the Delta system are high-modulus bridge calipers constructed from heat-treated 4140 cast steel. The high-modulus bridge design resists elastic deformation under load, meaning the caliper maintains its shape under heavy braking stress and returns consistent, predictable pedal feel every time. The four-piston calipers feature forged T6 6061 aluminum housings with hard-anodized bores and hard-chrome plated pistons for durability and reduced friction. EPDM synthetic boot material seals pistons against water and contaminants — critical for off-road and trail use.

The system pairs those calipers with massive 14-inch x 1.25-inch slotted and vented rotors front and rear. Heat-treated heavy cast-iron construction improves heat absorption, while the slotted and vented design maximizes gas and heat dissipation for fade-resistant performance. A GEOMET coating on all non-friction surfaces provides corrosion resistance. The low-profile bridge design accommodates these 14-inch rotors behind 17-inch wheels.

Installation is a 100% bolt-on process — no cutting, welding, or adapters required. Built-in auto-bleeder valves allow single-person brake bleeding. Brake pads use a drop-in design, so calipers never need to be disassembled for future pad replacements. The system is engineered to work with the stock proportioning valve and ABS, with brake bias and piston sizes optimized specifically for Wrangler and Gladiator platforms.

Note: This kit requires the 8x6.5-inch bolt pattern (not stock Wrangler or Gladiator axles). On JK/JKU models, TeraFlex recommends upgrading the stock master cylinder and brake booster to the Mopar Master Cylinder & Brake Booster Kit (# P5160050). Will not work with Hutchinson Rock Monster wheels. A 5x5-inch bolt pattern version is also available (# 4403450).

Kit Includes:

• Delta Brake Caliper Kit with Pads — High-Modulus — Front (# 4403401)
• Delta Brake Caliper Kit with Pads — High-Modulus — Rear (# 4403402)
• 14 in. x 1.25 in. Delta Brake Rotor Kit — Slotted & Vented — Front, 8x6.5 in. (# 4403485)
• 14 in. x 1.25 in. Delta Brake Rotor Kit — Slotted & Vented — Rear, 8x6.5 in. (# 4403486)
• All necessary hardware

Specifications:

• Rotor Diameter: 14 in. x 1.25 in. (front and rear)
• Bolt Pattern: 8x6.5 in.
• Minimum Wheel Diameter: 17 in.
• Maximum Back Spacing: 4.75 in.
• Caliper Material: Forged T6 6061 aluminum housing, 4140 cast steel bridge
• Piston Finish: Hard-chrome plated
• Rotor Coating: GEOMET on non-friction surfaces
• Pad Type: Proprietary composite-resin semi-metallic, drop-in design

Stock Brake Rotor Reference (for comparison):

• JL Sahara/Rubicon front: 12.9 in. x 1.1 in. (330mm x 28mm) vented
• JL Sahara/Rubicon rear: 13.4 in. x 0.55 in. (342mm x 14mm) solid
• JL Sport front: 12.9 in. x 0.94 in. (330mm x 24mm) vented
• JL Sport rear: 12.9 in. x 0.47 in. (328mm x 12mm) solid
• JT front: 12.9 in. x 1.1 in. (330mm x 28mm) vented
• JT rear: 13.6 in. x 0.86 in. (345mm x 22mm) solid
• JK front and rear: 11.9 in. x 1.1 in. (302mm x 28mm) vented (U.S.-spec)