NP241 Standard Strongbox Twin Stick Tested Input Speed: Up to

Tested Input Speed: Up to 13

you need to bore out your input retainer to fit the upgraded larger shaft

The Bottom Line

A Modern Dana 300 Replacement Case: The APEX abandons outdated and easily bent shift fork technology from the 70’s

The Big Stubby is comes with a Behemoth Juggernaut shaft in a 35 spline configuration that is 1

NP241 Standard Strongbox Twin Stick Tested Input Speed: Up toThe NP241 Standard Strongbox underdrive by Behemoth Drivetrain is engineered for extreme strength, low weight, and incredible performance. The NP241 Strongbox is available as both a fully geared ready to install model, or a DIY version that is case only allowing you to choose and install your own gears. Gear Compatibility: The NP241 Standard Strongbox DIY case is designed to be compatible with NP231, NP233, NP236, NP241, NP243 and NP246 series gears.