903647 Centax spring x-hard
Serpent introduces this extra hard Centax spring to be used in Serpent Viper and all previous Serpent 1/8 scale cars and many other 1/8 cars.
This extra hard spring is precision made and flat grinded for even performance and black coated. .
Serpent designer Ron Ton invented the Centax clutch in 1992, and its has become the clutch that all brands in some way started using after too. Serpent continuously tries to improve this original concept.