These Serpent 402176 inserts serve as spare components to fine-tune roll stiffness on compatible X26 chassis. Sold as a set of four, the parts alter how the antiroll bar transmits lateral load without needing to change the whole bar, so you can make incremental tuning changes during practice.
The original compatibility reference points to Medius X26 steel EP (SER400052); verify this chassis identification before you buy. The inserts replace the small contact pieces inside the antiroll bar linkage or at the ends, modifying lateral compliance and transient roll response to help balance front and rear behaviour.
Installation is straightforward for those familiar with touring car antiroll systems: remove bar end links or retainers, swap the existing inserts for the new ones, then reassemble and test on the bench prior to track use. Typical toolset is basic hex drivers and pliers; always confirm fastener security after refit.
Tuning approach: implement modest insert changes to produce repeatable roll-rate differences, and combine with swaybar thickness and shock setup to broaden the effect. Keep notes for every change so you can compare results across sessions.
For racers and hobbyists using Medius X26 steel EP setups, these inserts offer an efficient way to adjust roll response with minimal downtime.
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