4.5" 2018-2024 Jeep Wrangler JL 4WD (4 door) Alpine RT4 Long Arm Suspension Lift Kit by Teraflex

The Teraflex 1533400 Alpine RT4 (Rogue Trail) 4.5-inch Long Arm Suspension System for the Jeep Wrangler JL 4-door provides an unprecedented smooth and quiet ride for excellent performance on and off the road. This is among Teraflex's most sought-after and adaptable systems; the 4.5" suspension is a favorite among enthusiasts, allowing for 35-inch to 39-inch diameter tires (depending on fenders used).

The Adjustable Alpine IR Long Arms play a pivotal role in balancing front caster angle pinion angles and optimizing rear pinion angles, anti-squat geometry, and tire position. Complemented by a heavy-duty forged adjustable front and rear track bars, this system enhances steering response, centers the axles for optimal vehicle roll center, and minimizes body roll, delivering unparalleled handling. The Long Arm Brackets strategically reposition frame-end control arm mounting points, restoring a near-factory orientation to mitigate bushing stress during extreme droop and absorb shock loads transferred through the Long Control Arms. The result is an improved suspension geometry, relaxed control arm angles, and superior ride quality across diverse terrains. These systems restore front and rear roll axis angles, minimizing brake dive and acceleration squat. TeraFlex suspension systems are engineered to reduce noise, vibration, and harshness, providing a refined driving experience.

Alpine IR Bushings

The Alpine IR Control Arms boast Independent Rotation (IR) Bushings, a revolutionary feature that eliminates bushing binds during full suspension travel. This innovation reduces the overall bushing load during articulation, ensuring unrestricted droop and delivering a noticeable improvement in ride quality, whether navigating highways or trails.

Why Upgrade to a Long Arm Kit?

When purchasing a Jeep lift kit, a common option is to choose between a "short arm" and a "long arm" kit. For those new to Jeeping, this refers to the control arms and their length. A short arm kit uses the factory mounting points for the control arms.  The long arm kit uses control arms that are extended in length over factory arms and require the installation of new mounting brackets. This design allows for greater suspension travel and articulation, resulting in improved off-road performance, especially in challenging terrain. The downside to the long arm kits is installation is more difficult, and the cost is usually significantly higher. If you are serious about off-roading and if it fits your budget, a long arm kit is a great option.

Shock Options

At Jack-it we offer the Teraflex lift kits in various shock packages to fit different budgets and needs.

Bilstein 5100: This German-engineered shock is a great option for those looking for great on- and off-road performance without breaking the bank. It is a mono-tube gas shock with a zinc plate finish and 46mm piston.

Falcon 3.3 Fast Adjust: Our most premium option is the Falcon 3.3 Fast Adjust shock. These awesome shocks feature a reservoir for added oil capacity and the Fast Adjust knob to alter dampening characteristics based on the current terrain quickly. Like the Falcon 2.1, they use a 2.3-inch body and a 7/8-inch piston.

Features and Benefits:

• RT (Rogue Trail) is ideal for hardcore off-roading without giving up ride quality
• RT Adjustable Long Arms & Brackets correct front caster angle and pinion angles and rear pinion angles
• IR Bushings eliminates bushing binds during full suspension travel
• Alpine Long Arms provide a full range of movement for off-road flex and articulation
• Control arms built for strength using up to 50mm x 5mm wall DOM
• Adjustable front and rear track bars are made of forged steel for strength
• Front SpeedBump and Rear Progressive Bump Stops provide progressive compression during high-speed suspension movement
• Features Front Sway Bar Quick Disconnects
• Responsive handling with reduced noise, vibration, and harshness
• Front Long Arm Suspension Crossmember provides additional strength
• Brackets are gusseted and reinforced for superior strength with reduced NVH compared to other long-arm kits
• Brackets feature a premium triple-stage powder coating that offers superior durability and corrosion resistance
• Sport/Sahara Fenders: 35”-37" Max Diameter Tires
• Rubicon Fenders: 37" Max Diameter Tires
• Aftermarket High Fender: 39" Max Diameter Tires
• Maintenance-free IR bushings improve on and off-road quality performance
• Full range of movement, great for off-road flex and articulation
• Reduces noise, vibration, and harshness
• Estimated install time: 27.5 - 28.5 hours
• TeraFlex Limited Lifetime Warranty against defects
• Made in the USA