Rancho 4
Rancho 4
Rancho 4
Rancho 4

Rancho 4" Crawler Long Arm Suspension Lift Kit - Black for 2007-2017 Jeep Wrangler JK/ Wrangler Unlimited JK

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The NEW RS66115B Crawler Long Arm Kit is the result of continuous engineering enhancements by Rancho€™s research and design team to give you the best possible onand off-road experience for your JK. The new and improved Long Arm Kit includes progressive rate coil springs and fully adjustable extended length control arms with D2 bushings to give you improved comfort, durability and worry free operation. This kit also features our new heavy-duty front and rear adjustable track bars with D2 bushings to center the axles. The D2 bushings found in our control arms and track bars feature PTFE for grease-free operation allowing the sleeve to rotate in the bushing without resistance reducing wear. A transmission cross member RS886101 (2011-07) or RS886102 (2018-12) must also be ordered with this kit to make it complete. Exhaust cross over pipe RS720003 is required for (2018-12) when not replacing the front driveshaft. The RS66115B supersedes our RS66105 and RS66105B kits. The Rancho brand offers a Limited Lifetime Warranty** for this suspension system.

Important Notes:

  • Maximum Tire Size: 37"
  • Wheel Backspacing: 4.5"
  • During high articulation events, the front drive shaft may contact exhaust or transmission oil pan. A smaller diameter drive shaft is suggested for optimal performance.

Required Parts by Manufacturer:

  • 2007-2011 Jeep Wrangler JK models require a Transmission Cross Member, RS-886101, for installation.
  • 2012-2017 Jeep Wrangler JK models require a Transmission Cross Member, RS-886102, for installation.
  • A Crossover Exhaust Pipe, RS-720003, is required for all 2012-2017 Jeep Wrangler JK models when NOT replacing the front driveshaft.

Vehicle Applications:

  • 2007-2017 Jeep Wrangler JK
  • 2007-2017 Jeep Wrangler Unlimited JK

Year(s): 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 and 2017

Features and Benefits:

  • High-articulation front and rear long arm design
  • Designed for on and off-road performance
  • 100% bolt-on system

Parts Included:

  • (2) Front Dual Rate Coil Springs
  • (2) Rear Dual Rate Coil Springs
  • (2) Front Lower Control Arms
  • (2) Rear Lower Control Arms
  • (2) Rear Upper Control Arms
  • (2) Front Sway Bar End Links
  • (2) Rear Sway Bar End Links
  • (2) Caster Links
  • (2) Front Brake Lines
  • (2) Rear Brake Lines
  • (2) Rear Brake Line Brackets
  • (2) Front Bump Stop Spacers
  • (2) Rear Bump Stop Spacers
  • (2) Control Arm Brackets
  • (1) Front Adjustable Track Bar
  • (1) Rear Adjustable Track Bar
  • (1) Rear Track Bar Axle Bracket
  • (1) U-Bolt

Shipping is Free 🙂



Shipping and Delivery Times


  • All in-stock products are shipped within one business day. Delivery usually takes 2-5 business days. We have a large number of warehouses in different states which allows us to deliver the orders very fast.





  • Most products are shipped via UPS Ground, FedEx depending on size with some large items shipped by SAIA or others.
  • Once your order ships, tracking details will be emailed to you.



Where’s my order?


  • Good question, when tracking details have been provided that means your order has been processed and shipped. Tracking details usually appear in the shipper’s database within one business day, i.e. UPS and FedEx generally provide point-in-time tracking meaning your order location is updated as it is scans and gets closer to you.  Most orders should arrive within 2-5 business days. Still have an issue with delivery, please contact us to see how we can help.





  • Cancellations are free. Please contact us ASAP if you need to cancel your order.

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