The Serpent 903812 Lightweight Pulley Adapter is a precision upgrade for the Viper 990 GP 2-speed shaft. It reduces rotating mass to support smoother gear engagement and more consistent power delivery across laps.
Built to cut unnecessary weight while retaining strength, this adapter enhances throttle response and helps drivers fine-tune handling balance. Its fitment for the Viper 990 GP makes it a practical option for racers focused on driveline refinement.
Whether trimming lap times or improving everyday handling, the Serpent 903812 Pulley Adapter offers a straightforward performance tweak. Lighter rotating parts mean crisper acceleration and improved modulation exiting corners.
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