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For 03-24 4Runner, 05-23 Tacoma (6 lug), FJ Cruiser, GX470 models.

 

This weld-it-yourself suspension system increases your wheel mounting surface (WMS) width by 7" total and is designed to achieve 16" of wheel travel with modified long travel CV axles (sold seperately). This kit is compatible with 2WD and 4WD models and is designed for 10" travel coilovers and 10" travel bypass shocks. This kit does require frame modification to install as the upper control arm mounts are relocated to a new structure that must be welded to the frame rails. This new structure does not interfere with OEM style upper control arms and does NOT restrict you to J-Arm style upper control arms permanently.

 

8" J-Arm and 10" J-Arm kits cycle the same amount of wheel travel and have different motion ratios. 8" shocks yield 2:1 MR while 10" shocks yield 1.6:1 MR. Kamono 10" Coilover/Bypass Tower (sold deperately) or custom shock hoop/structure is required.

 

THE DIY AND WELDED OPTIONS ARE NOT BOLT ON. INNER FENDER/BODY MODIFICATION IS REQUIRED FOR J ARM PIVOT MOUNTING. BUMP STOP STRUCTURE REQUIRES MODIFICATION FOR FULL UP TRAVEL. FACTORY STRUT TOWERS MUST BE CUT FOR COILOVER MOUNTING CLEARANCE. BODY LIFT WILL INCREASE EASE OF INSTALL AND REDUCE MODIFICATION REQUIRED. THIS KIT IS FOR OFFROAD USE ONLY!

 

If you aren't willing to do a significant level of fabrication to run this kit, the +3.5" A-Arm LT kit requires much less modification. The wheel travel and shock options are somewhat restrictive compared to the J-Arm LT kits.

+3.5" J-Arm LT DIY - 10" shock - 03-23 Toyota

$2,949.00Price
  • Kit Includes:

    • Upper control arm plates, bungs, heims, & misalignments
    • Lower control arm plates, uniballs, DOM bushings, and zerks
    • Knuckle box plating, knuckle jig
    • J-Arm frame mounting structure
    • LCA alignment tabs
    • All bolts, nuts, and hardware

    SELECT LT ADD ONS HERE

    Lead Time: Approximately 6 weeks

All parts are for offroad use only

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Proudly Made in the USA

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©Filthy Suspension Concepts, LLC (DBA Kamono Concepts) 2025. All products, workmanship, and parts are intended for offroad use only. All products are not intended to be constructed in any other way than the original design and should only be assembled by professional fabricators/welders (or with professional welder supervisor) that can ensure sufficient welding penetration, part alignment, and dimensional accuracy. Customer assumes all liability in assuring that parts are installed correctly, maintained, and fully operational. Filthy Suspension Concepts is not responsible or liable for any accidents, injuries, or deaths that may occur from the use of any products offered. Suspension modifications may change the dynamics and stability characteristics of the vehicle. Verifying that the wheels are in alignment after suspension modification is important and should be done to ensure predictable, safe handling. All drivers using components designed by Filthy Suspension Concepts must be aware of changes in vehicle performance and should not operate the vehicle in an unsafe manner.

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