This set has been developed for high rpm speed.Our tappets are 17% lighter and 30% stronger than the original factory tappets and you will see the oil channels on the tappet, this design is helix oil channels developed by PPR motorsport and reduces friction by 11%.Valves in the set are made of nimonic alloy and titanium coated. They have a tensile strength of 1480 mpa and are durable up to 3000 hp.