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:
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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:
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6.14" with Standard Lid
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7.02" with HD Lid
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CNC-Machined Billet Aluminum:
Built to take abuse and keep going—trail after trail
Installation Notes:
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Intermediate mechanical skill required
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Planetary gearset not included
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Installation overview included
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DISCLAIMER
THIS PRODUCT IS FOR OFF ROAD USE ONLY. THE PRODUCTS SUPPLIED IN THE DELIVERED KIT ARE MANUFACTURED AND ASSEMBLED SPECIFICALLY FOR THE PURCHASED CONVERSION TYPE. ALL MODIFICATIONS TO COMPONENTS THAT HAVE NOT BEEN APPROVED OR AUTHORIZED BY NORTHWEST FABWORKS INC (NWF) WILL VOID WARRANTY AND/OR RETURNS. NWF IS NOT RESPONSIBLE FOR DAMAGED COMPONENTS THAT ARE NOT INCLUDED IN THE PURCHASED PRODUCT. NWF IS NOT RESPONSIBLE FOR DAMAGED NWF PRODUCTS CAUSED BY THE FAILURE OF NON-NWF PARTS. NWF DOES NOT COVER DAMAGE CAUSED BY INCORRECT INSTALLATION AND/OR ASSEMBLY. NWF LIMITS LIABILITY TO PRODUCT REPLACEMENT AND IS NOT LIABLE FOR LABOR, STORAGE, LOST WAGES OR OTHER COSTS ASSOCIATED WITH DOWNTIME. NWF DOES NOT WARRANTY PRODUCTS THAT HAVE BEEN USED OUTSIDE OF THEIR INTENDED USE.INSTALLATION OF THE FOLLOWING PRODUCT MAY VOID AUTOMOTIVE MANUFACTURER WARRANTY.