Current EcoBox-205 Lead Time is 4-6 Weeks

EcoBox NP205 Integrated – DIY Underdrive Builder Kit

The EcoBox NP205 Integrated is a DIY-focused version of our BlackBox 205 Titan—built for those who want maximum strength and performance, with the freedom to assemble it themselves.

This billet aluminum underdrive box mounts directly between your transmission and NP205 transfer case, providing a powerful low-range gear for serious off-road control. Designed for builders, it ships as a bare housing—you provide the planetary gearset (compatible with NP241C-style assemblies) and finish the build your way.

Looking to Step Things Up?

Add the Eco HD Lid for even more durability. With an integrated bearing retainer and 1.5× the load rating of the standard lid, it's the ultimate choice for high-torque builds or peace of mind in extreme terrain.

 Key Features:

• DIY-Ready Build:
  Ships as a bare housing for your own NP241C-style planetary gearset

• Direct NP205 Integration:
  Bolts straight to your NP205—no adapters, no spacers

• Compact Footprint:

  • 6.14" with Standard Lid

  • 7.02" with HD Lid

• CNC-Machined Billet Aluminum:
  Built to take abuse and keep going—trail after trail

Installation Notes:

• Intermediate mechanical skill required

• Planetary gearset not included

• Installation overview included