The Serpent SER903636X 2-speed Gear 61T SL8 XLI V2 is designed for drivers who expect repeatable performance from their Viper 989 GP transmission. It focuses on stable engagement and minimal power loss during shifts.
This 61T unit is intended for the Serpent Viper 989 GP (SER903018) and installs into the stock gearbox layout without major alteration when used as a direct replacement.
When set up correctly, the 61T SL8 XLI V2 helps prevent slipping at shift points and preserves driveability across corner exits, making it a practical upgrade for competitive running.
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