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NP243 and NP246 series gears
and case hardened
and demanding commercial or motorsport applications
Motorsport & Advanced EV Programs
AND a DIY builder's model that is case only - allowing you to use and install your own gears
Dana 300 Colossus Shifter Upgrade D300 NP243 and NP246 series gearsThe D300 model Colossus Case has been a proven workhorse for more than a decade. Upon releasing our 2022 Pro Series case, we dramatically upgraded the internal and external shifter assemblies to both reduce weight, and provide incredible durability to the internal and external shifter components. This kit is designed to to fit all models of D300 Colossus cases, and is installed as a simple plug and play replacement of the original components.
