Toytec BOSS Suspension System for 10+ 4Runner and FJ

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

TTBOSS-4R210 Includes:

• TTFCS2005- Toytec’s BOSS 2.0 Front Coilovers-
  • 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.  
  • TTFCS2005 vomes fully assembled and ready to bolt on for easy install. 
  • All parts are 100% made in the U.S.A.

• Sway bar relocate bracket needed for clearance for non-KDSS vehicles. Select from Dropdown

Choose coil spring rate and color options above.

• • Red or Silver 600lb Rate Coils – Works well with stock weight.
  • Red or Silver 650lb Rate Coils – Firmer ride or for use with a bumper or winch.
  • Red or Silver 700 lb Spring Rate coils – Excellent choice for use with a bumper and winch

• • Toytec Rear Superflex Coils: – Our BOSS kits come 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 Shocks:  

• • LKFJ20R-P – Toytec 2.0 Aluma Series IFP Rear Shocks
    • Perfectly matched to pair with the Boss Aluma Series Coilovers
    • Tuned for maximum performance and comfort.
    • Gas-pressurized design with internal floating piston to help prevent cavitation and fading
    • The shock bodies are 2.5″(56mm) made from hard anodized aluminum for cooler operation as well as better protection from the elements.
    • These are completely rebuildable, serviceable and tunable.

Add Upper Control Arms to complete your kit:

• • Total Chaos Uniball Upper Control arms – 96504 – Maximize your wheel travel and increase your strength while also correcting alignment angles.
  • SPC Adjustable Upper Control Arms – 25480 – The most adjustable UCA on the market.  Correct your alignment angles and help with adjusting for tire clearance. 

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