Set of 8 high performance exhaust valves for the Yamaha FZR 1000 EXUP and Thunderace engines. Does not fit earlier FZR 1000 Genesis engines.

Made of the best grade stainless steel (EV8 / 21-4N) commonly used in all high performance valves used for racing or high strung engines (N/A, turbo or nitrous), these are a great improvement over the standard valves not only in flow but also in strenght and heat resistance.

Valves are finished with durable black nitride coating to avoid stem wear and increase durability. All valves have hardened valve tips.

These valves are 25,0mm (stock size). We found this is the best size to use with our oversize intake valves and still allow the camshaft overlap needed on race engines without contact between intake and exhaust valves.

Oversize intake valves also available.