Hello,
Thank you for your feedback regarding the set of 4 valve stem.
This white one is for the admission valve and replace the original black color from original Ducati ?
Regards
Gabriel
The white one is the old silicone used as stock on the Ducati Bevel Gears models and it was used both on intake and exhaust valves: if you want the newer version then you should take both green color valve seals
Klicken Sie hier, um den Link anzuzeigen and black color
Klicken Sie hier, um den Link anzuzeigen