The Serpent 401633 Aluminum 19T Mid Pulley is crafted to match the S411 chassis requirements, offering a solid aftermarket upgrade for precision tuning. Made from quality aluminium, it provides better resistance to wear while maintaining accurate tooth engagement for predictable power delivery on track.
Using high-quality aluminium, this mid pulley keeps rotating mass low while remaining tough enough for regular club running. The result is improved throttle response and steadier performance over multiple heats without premature wear.
This 19T pulley is engineered to fit the Serpent S411 without alteration. Its exacting tolerances allow straightforward replacement of worn parts or a quick upgrade between race days, keeping setup time to a minimum.
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