Set of 8 high performance exhaust valves for the 4 valve Suzuki GS1100, GS1150 and GSX1100 Katana (1981 onwards).
 
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 strength and heat resistance.
 
Valves are finished with durable black nitride coating to avoid stem wear and increase durability.
These valves have hardened valve tips (Stellite Tips) so they can be safely used with the original rocker arm setup.
 
Race Series is our new design that improves on our previous valves, with a 30º Back Cut to improve airflow and smooth the transition to the seat area as well as other improvements aimed at saving weight by optimizing valve dimensions.
 
These valves are 24,5mm (1,5mm oversize) and are designed to work with the original valve seat requiring only usual valve seat machining.
 
Oversize valves are a great way of increasing cylinder head flow for modified and big bore engines.
 
Oversize intake valves also available.