JL/JLU - JK/JKU: Delta Brake Kit

The TeraFlex JL/JLU–JK/JKU: Delta Brake System is the ultimate upgrade for JL/JLU and JK/JKU Wrangler models with oversized and heavier wheels/tire combos requiring increased braking performance. A must for 33-42” tires or heavy-laden overland rigs. Includes all the components required to upgrade both front and rear axles. Delta Brake Calipers feature a high-modulus bridge. Modulus measures a material’s resistance to elastic (recoverable) deformation under load. A stiff material has a high modulus, which means it only changes shape slightly under high elastic loads before returning to its normal shape. Fits: JL Wrangler (2-door) JLU Wrangler Unlimited (4-door) JK Wrangler (2-door) JKU Wrangler Unlimited (4-door) Minimum Wheel Diameter: 17” Back Spacing: 4. 75” or less – MUST VERIFY FITMENT W/ DOWNLOADABLE TEMPLATE Bolt Pattern: 5x5” Includes: High-Modulus Brake Caliper Kit w/ pads- front (# 4403401) High-Modulus Brake Caliper Kit w/ pads - rear (# 4403402) 14” x 1. 25” vented & slotted rotors w/ 5x5” bolt pattern - front (# 4403455) 14” x 1. 25” vented & slotted rotors w/ 5x5” bolt pattern - rear (# 4403456) All necessary hardware Features & Benefits: Delta Brake Kit: Significantly improved braking performance over factory brake system Balanced front to rear brakes tuned specifically for lifted vehicles Brake bias and piston sizes optimized for JL/JLU and JK/JKU Wrangler models Designed to work w/ stock proportioning valve and ABS 100% bolt-on upgrade for easy installation 3-year Calipers: Opposed 4-piston caliper design w/ 2” front pistons and XX” rear pistons Same flow rate as factory 2-piston calipers – 4 pistons move each side half the distance instead of 2 pistons only moving one side the full distance EPDM synthetic boot material keeps water and other contaminants away from piston Hard-chrome coating on piston reduces friction to improve performance 4-piece High-Modulus bridge caliper design combines heat-treated 4140 cast steel bridges w/ 6061 T6 forged aluminum piston housings Steel bridges resist bending/flex better than standard aluminum or cast iron Improved stiffness = consistent brake feel/modulation during brake application and release Low-profile bridge accepts 14” diameter rotors behind 17” wheels 1, 000-hour salt spray tested zinc-and E-dipped coating on bridges and mounts 300, 000 psi steel formed hardware Calipers feature built-in auto bleeding check ball, valve, and spring for easy bleeding Hard-coat anodized, scratch-resistant piston bores Brake Rotors: Massive 14” x 1. 25” vented rotors for superior stopping performance Larger diameter rotors offer more mechanical advantage for more stopping power Heat-treated, heavy cast-iron rotors offer better heat absorption Mill-balanced, vented rotors for maximum heat dissipation Included slotted rotors offer better gas dissipation than smooth rotors GEOMET coating on non-friction surfaces resists corrosion Rotors feature 5x5” bolt pattern Brake Pads: Proprietary composite-resin, semi-metallic pads provide excellent full temperature stopping power for maximum initial speed scrub w/ increased pad life and reduced noise and dust Drop-in pad design – no need to disassemble calipers to replace pads Stock Brake Rotor Reference: JL/JLU Sport front: 12. 9” x 0. 94” (330mm x 24mm) vented rotors/JLU Sport rear: 12. 9” x 0. 47” (328mm x 12mm) solid rotors/JLU Sahara/Rubicon front: 12. 9” x 1. 1” (330mm x 28mm) vented rotors/JLU Sahara/Rubicon rear: 13. 4” x 0. 55” (342mm x 14mm) solid rotors/JKU front: 11. 9” x 1. 1” (302mm x 28mm) vented rotors (U. S. -spec)JK/JKU rear: 11. 9” x 1. 1” (302mm x 28mm) vented rotors (U. S. -spec)Note(s): Requires a minimum wheel diameter of 17”. On JK/JKU models, we recommend upgrading the stock master cylinder and brake booster to the Mopar Master Cylinder & Brake Booster Kit (# P5160050). Contact your Mopar dealer for availability. Install Time: 4 Hours Available Configurations: JL/JLU–JK/JKU: Delta Brake Kit - Front & Rear - 5x5” Bolt Pattern (# 4403450)JL/JLU–JK/JKU: Delta Brake Kit - Front & Rear - 8x6. 5” Bolt Pattern (# 4403480)