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Fabtech K4231DL 5″ Trail System – Front Dirt Logic 2.5 Resi Coilovers & Rear Dirt Logic 2.25 Shocks

2021-2025 Jeep Wrangler 4-Door JL 4WD
Fabtech K4231DL 5″ Trail System – Front Dirt Logic 2.5 Resi Coilovers & Rear Dirt Logic 2.25 Shocks
4970.57In stock
2021-2025 Jeep Wrangler 4-Door JL 4WD
  • Brand : Fabtech
  • SKU : K4231DL
  • Part Number : K4231DL
4.9257075471698 848 5
98.514150943396%
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Product Details

This Trail suspension system for the 4 Door Jeep JL is engineered to significantly enhance suspension performance across a wide range of offroad conditions including rock crawling, aggressive trail use, and overland travel. On-road ride quality is equally refined, with rear dual rate coil springs and carefully tuned shock valving that deliver a smooth, compliant, and controlled driving experience ideal for daily use.

The system is designed as a complete short arm suspension that utilizes factory control arm mounting points for straightforward installation while maintaining proper suspension geometry. Fabtech’s heavy duty lower link arms are constructed from 1.75" OD, .250" thick wall steel tubing and are guaranteed not to bend under extreme offroad conditions. These link arms combine large polyurethane bushings with Fabtech’s proven 5 Ton Joint® technology to provide excellent articulation, reduced noise, and long-term durability.

The coilover conversion is supported by heavy duty 1/4" thick steel bracketry that securely mounts to the factory coil spring buckets and frame. Dirt Logic 2.5 Coilovers feature an all stainless steel body for unmatched corrosion resistance and longevity. Compared to traditional coil spring and shock configurations, these coilovers dramatically improve ride comfort, suspension control, and damping performance both on the highway and in rugged terrain.

Steering geometry is properly corrected to match the increased ride height through the use of a heavy duty draglink flip system and reinforced track bar brackets. This design maintains factory steering angles, allows full suspension articulation without binding, and avoids increasing load on the steering box. Rear suspension geometry is equally refined to maintain the factory roll center while keeping the axle properly centered throughout suspension travel.

Every component in this system is engineered to work together as a complete package, delivering improved wheel travel, predictable handling, and long-term reliability. This makes it an excellent choice for daily driven Jeeps that regularly encounter demanding trails and extended overland adventures.

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Fitment

YearsMakeModelDrive
2021-2025JeepWrangler 4-Door JL4WD

Features

  • Coilover Conversion: Heavy duty bolt-on bracketry allows secure mounting of Dirt Logic 2.5 coilovers for superior highway comfort and offroad control.
  • Control Link Arms: Short arm design maintains proper factory bushing angles to reduce premature wear and preserve consistent handling.
  • Link Arms: 1.75" OD, .250" thick wall steel construction guaranteed not to bend and equipped with Fabtech 5 Ton Joints® for strength, quiet operation, and longevity.
  • Dual Rate Long Travel Coil Springs: Progressive dual rate design absorbs small bumps smoothly while increasing spring rate to manage larger impacts and additional cargo weight.
  • Draglink Flip System: Corrects steering geometry to eliminate bump steer and provide bind-free operation through full suspension travel.
  • Front Track Bar Bracket: Heavy duty 1/4" thick steel bracket repositions the track bar to the proper operating plane for improved stability.
  • Rear Track Bar Bracket: Reinforced bolt-on design maintains axle centering and factory roll center throughout suspension movement.
  • Bump Stop Extensions: Front and rear extensions prevent suspension over cycling and protect steering and suspension components.
  • Sway Bar Links: Extended length links with urethane bushings reposition sway bars to eliminate bind and maintain proper function.
  • Dirt Logic Shocks: Stainless steel body with NitroSteel® piston rod provides excellent corrosion resistance, consistent damping, and superior on-road and offroad performance.

Components

  • 1 x FTS24230 Rear Coil Spring Kit
  • 1 x FTS24208 Front & Rear Short Arm Lower Links
  • 1 x FTS24231 Component Box
  • 1 x FTS24210 Drag Link Kit
  • 1 x FTS24268 Front Coilover Mount Kit
  • 1 x FTS24237 Front Dirt Logic 2.5 Resi Coilovers
  • 2 x FTS811432 Rear Dirt Logic 2.25 Shock

FRONT DIRT LOGIC 2.5 RESI COILOVER

The Dirt Logic 2.5 Resi Coilover provides outstanding high speed damping with the ability to crawl at low speed with maximum articulation for big rocks.

  • 2.5″ OD Stainless Steel Body
  • 2.25″ OD Billet Aluminum Piston
  • 7/8″ NitroSteel® Black Piston Rod
  • Cold wound dual rate coil springs
  • Adjustable Coilover Construction
  • 5/8″ Spherical Ball Mounting Ends
  • 2.50″ OD Aluminum Reservoir w/-8 Stainless Steel O-ring Hose

DIRT LOGIC 2.25 SHOCK

Dirt Logic 2.25’s are designed to replace factory shocks with a larger, more robust configuration.

The 2.25 size is what separates it from other replacement take apart shocks for a superior ride, both on and off road.

Shocks are pretuned for each Fabtech suspension, accounting for larger tires, providing the finest all around damping.

  • 2.25″ OD Stainless Steel Body
  • 2.0″ OD Billet Aluminum Piston
  • 7/8″ NitroSteel® Black Piston Rod
  • Polyurethane Mounting Ends

Quick Specs

Stock Fenders

  • Tire Size – 37/12.50R17 Wheel Size – 17X9 w/ 4.5in BS w/minor trimming
  • Tire Size – 37/12.50R18 Wheel Size – 18X9 w/ 4.5in BS w/minor trimming
  • Tire Size – 37/12.50R20 Wheel Size – 20X9 w/ 5in BS w/minor trimming

High Clearance Fenders

  • Tire Size – 37/12.50R17 Wheel Size – 17X9 w/ 4.5in BS w/no trimming
  • Tire Size – 40/13.50R17 Wheel Size – 17X9 w/ 4.5in BS w/cutting
  • Part Number : K4231DL

Important Notes

  • California Prop 65 Warning
  • 185. Fits 4-door models only.
  • 224. Does not fit 4XE models.
  • 225. Does not fit Rubicon 392 models.
  • 253. Front driveshaft is required. Order FTS94057.
  • 254. Heavy offroad use requires rear driveshaft FTS94065.

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