Evotech Performance. Ducati Panigale V4 & S (2025 - On). Features of EP Front Spindle Bobbins for the Ducati Panigale V4. Features of Rear Spindle Bobbins for the Ducati Panigale V4. EP Rear Spindle Bobbins for the Ducati Panigale V4 are designed to protect both sides of the expensive swing-arm and brake calipers.