Toytec Boss Suspension System | 2003-2009 4Runner


BOSS Suspension System Fits All 2003-2009 Toyota 4Runners, 2007-2009 FJ Cruisers & 2003-2009 Lexus GX470’s.  Designed for the best overall ride comfort and performance in mind, this is the most complete lift kit on the market.

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SKU: TTBOSS-FJ3K Categories: , ,


Toytec BOSS Suspension System Fits all 03-09 Toyota 4Runners; 07-09 FJ Cruisers & 03-09 Lexus GX470’s

Designed for the best overall ride comfort and performance in mind, this is the most complete lift kit on the market.


  • TTFCS2005- ToyTec’s BOSS standard 2.0 front Coilover -designed with a larger 5/8” nitro steel shock shaft which is much more corrosion resistant than chrome plating and is valved specific to your vehicle, improving the overall handling and performance. The threaded Clear-Blue Chromate zinc plated steel shock body is adjustable from 0-3” of front lift height and can be fine tuned to level your truck side to side and front to back. Each shock has a 200 psi gas charge and is dyno’d before it ships. Upper mounts and adjustment rings are machined from 6061-T6 Billet aluminum and are then anodized black to prevent corrosion. TIG welded spanner wrenches are included for easy adjustment.  Comes fully assembled and ready to bolt on for easy install. Includes sway bar relocate bracket needed for clearance.  All parts are 100% made in the U.S.A.

Choose coil spring rate and color options above.

    • Red or Silver 600 lb. (Stock weight)
    • Red or Silver 650 lb. (80-150 lbs constant load)
    • Red or Silver 700 lb (175 -250 lbs constant load)
    • Front Differential Drop kit  – Recommended for all lifted 4x4s
    • Toytec Signature rear bump stop drop Kit- Part # RM43006 – Designed to work with our Superflex rear coils allowing your rear bump stops to function properly protecting your rear shocks from damage and keeping the rear tires from hitting the fenderwell.
    • Toytec Rear Superflex Coils: – Our BOSS kits comes standard with Toytec RCC2.0 rear springs- These springs offer 2″ of  lift with stock rear weight with the best overall ride quality and rear articulation.
    • Optional HD Rear Superflex coils offer additional weight capacity.  (Recommended 150-200 lbs of constant load for 2-2.5″ of lift.)

Rear Shock Options:

    • TT-75109 Toytec BOSS rear shocks are optimized for maximum travel with Superflex coils
    • TT-75110RR – Rear BOSS 2.0 Remote Reservoir Shocks.  For additional performance, the remote reservoir shock will hold more oil to prevent shock fading on rougher applications.

Add Upper Control Arms to complete your kit:

    • SPC Adjustable Upper Control Arms – SPC-25480
    • ICON Billet Upper Control Arm Kit with Delta Joints – IVD-58551DJ

** Please contact us if you have rear factory airbags in your 03-09 4Runner.

Note:  Boss front coilovers are only designed to work with stock front lower control arms


WARNING: Cancer and Reproductive Harm –

Make Model Year
Toyota 4Runner 2003 - 2009
Toyota FJ Cruiser 2007 - 2009