Replacement Prox intake valve and spring kit compatible with Yamaha outboard engines — OEM-equivalent performance, precision-engineered for reliability and seamless integration. Part number: 28.SIS2414-2.

Description

• Replaces the OEM valves and valve springs
• Steel, nitrided valves for increased durability and less wear under extreme conditions
• Stronger valve springs deal with the extra weight of the steel valves
• Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm
• Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM retainers, bases and valve seals

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