Rancho Sport Suspension System Component Box: Jeep Wrangler 2021-2023

Rancho Sport Suspension System Component Box

2021–2023 Jeep Wrangler Unlimited High Altitude 4xe, Rubicon 4xe, Sahara 4xe

RS66136B-1

Overview:

The Rancho Sport Suspension System Component Box is engineered specifically for the 4-door Jeep Wrangler JL Unlimited 4XE models from 2021 to 2023. Designed to enhance both on-road comfort and off-road capability, this premium suspension system provides a 3-inch lift, delivering the additional ground clearance needed for serious trail adventures. Whether you're tackling rocky terrain, trail riding, or cruising on pavement, this suspension kit is tuned to maintain a balanced, stable ride without sacrificing drivability.

Ideal for Jeep enthusiasts seeking a reliable upgrade that supports larger tires and improves vehicle stance, the Rancho Sport Suspension System integrates seamlessly with the Jeep’s factory electronic stability system, ensuring safety and performance remain uncompromised.

Key Features:

This suspension system offers a comprehensive set of features designed to optimize your Jeep Wrangler’s performance and durability:

• Front and rear corner-specific progressive rate coil springs tuned for superior ride comfort and off-road performance
• 3-inch suspension lift compatible with up to 35-inch tires on 17-inch wheels with 4.5-inch backspacing
• Compliance with NHTSA FMVSS126 standards, maintaining compatibility with the vehicle’s electronic stability system
• Includes bump stops, extended sway bar end links for front and rear, and e-brake line relocation bracket
• Brackets fabricated from high-strength, low-alloy steel for enhanced durability and long service life
• Allows use of original equipment wheels and tires without modification
• Designed specifically for 4-door Jeep Wrangler JL 4XE models (excludes diesel and non-4XE variants)
• Supports advanced driver-assistance systems (ADAS) recalibration to maintain safety features
• Sold as part of a two-box kit; this is box 1 of 2 (RS66136B-1 and RS66136B-2 required for complete installation)

Construction & Design:

The Rancho Sport Suspension System is crafted with precision-engineered components built to withstand the rigors of off-road use. The coil springs are progressive rate and corner-specific, ensuring the suspension adapts dynamically to varying loads and terrain conditions. Brackets and hardware are constructed from high-strength, low-alloy steel, providing exceptional resistance to wear and corrosion for long-lasting performance.

Every element of the system is designed to maintain the Jeep’s factory geometry and electronic stability system compatibility, preserving the vehicle’s handling characteristics while delivering enhanced ground clearance and load capacity.

Installation & Fitment:

Installation is straightforward with a bolt-on design that fits directly to the 2021–2023 Jeep Wrangler Unlimited 4XE models, including High Altitude, Rubicon, and Sahara trims. No major modifications are required, though it is important to note that vehicles equipped with advanced driver-assistance systems (ADAS) will require professional recalibration after installation to maintain warranty coverage and system functionality.

This component box is part one of a two-box kit; both RS66136B-1 and RS66136B-2 must be ordered together for a complete suspension upgrade.

What's Included:

• Four front and rear corner-specific progressive rate coil springs
• Bump stops
• Front and rear extended sway bar end links
• E-brake line relocation bracket
• All necessary hardware for installation

Ideal For:

This suspension system is perfect for Jeep Wrangler 4XE owners who want to improve their vehicle’s off-road capability without sacrificing on-road comfort. It suits drivers who plan to run larger tires up to 35 inches, engage in rock crawling, trail riding, or require additional ground clearance for aftermarket accessories such as bumpers, sliders, and winches. It is also an excellent foundation for further suspension upgrades, including Rancho geometry correction brackets and adjustable control arms (sold separately).