This aluminum main chassis is an aftermarket replacement plate intended for the YR-X12 1/12 competition platform. Manufactured to the specified duralumin standard, the plate aims to adjust overall stiffness and lower the vehicle's centre of gravity while leaving suspension geometry and electronics unchanged.
The component is a 2.0mm thick plate produced to the 70-75 duralumin grade. The thinner section supports compact tyre packages and shifts mass lower in the chassis stack, which helps reduce roll and diminishes the risk of sudden high-side events on carpet surfaces.
Machining preserves critical strength areas while tuning the car's roll and pitch balance. In practice this provides a less nervous steering feel on very grippy tracks and a reliable platform for fine suspension and tyre work.
The chassis is a direct replacement for YR-X12 mounting points; check fastener alignment and part clearances before completing assembly. Consider this as one measured update in your overall setup process to retain predictable drivability while pursuing lap-time improvements.
As a specialist tuning part, this mainplate is designed to refine balance and reduce abrupt steering reactions on high-grip carpet; pair it with careful suspension and tyre adjustments to achieve the handling you require.
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