This 28pcs brass front C-hub kit by GPM is an aftermarket replacement set made for TRAXXAS TRX4 trail crawlers. It mounts between the front gearbox and knuckle arms to link the steering components and provides a stable platform for changing damper height and tilt during setup. The kit replaces factory linkage points and includes hardware intended to increase durability and permit multiple damper locations.
Key elements are solid brass C-hubs used both structurally and as ballast, stainless steel king pins to replace stock plastic pins for firmer pivoting, and assorted collars and screw lengths to adjust damper clearance and mounting height. A mix of round and flat head screws is included so you can assemble different collar stacks, tweak damper angle, and fit tie rods without modifying parts.
Fitment notes: the assembly sits between the front gearbox and knuckle arms and requires substituting the original pins and screws. Tie-rod anchoring uses 3x18 round head screws (2 pcs) where the original tied into the damper; damper screw lengths change by collar stack - 0 collars 3x14, 1 collar 3x16, 2 collars 3x18, 3 collars 3x20 - giving stepped changes to damper height and angle. Each brass hub adds about 49g of front-end mass when installed.
For TRX4 enthusiasts after a heavier, more serviceable front mount with selectable damper offsets, this GPM brass C-hub kit gives direct-replacement parts and collar/screw options to fine tune front geometry and response.
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