Our Yamaha Performance Valve Guides provide greatly improved durability for performance applications. A must for racing and high performance engine operation. Sold in sets of 16. Key Features: Constructed of Aluminum/Bronze/Nickle Alloy. Dramatically improves reliability in high boo...

Developed on our Dyno and tested extensively on the water, this water box features radiused exhaust tubes and end caps for optimum exhaust flow. Unique exhaust baffle will increase the low-end power and mid-range pull of your Yamaha watercraft. Delivers up to 15hp on modified engines along with sign...

Our Valve Retainer Upgrade Kit increases the reliability of your engine by reducing the possibility of valve float at high rpm. Includes 16 lightweight, precision-machined titanium valve retainers. A must for IJSBA & APBA Stock Class race craft and . Note: For highly modified engines we recommend...

Our Billet Aluminum Engine Oil Filler Cap adds durability and a custom look to your engine compartment. Precision machined from 6061 billet aluminum and anodized for a long lasting and durable finish. Direct replacement for original plastic oil cap on all Yamaha 1.8L HO, SHO & SVHO engines. Includes...

Our Billet Aluminum Engine Oil Filler Cap adds durability and a custom look to your engine compartment. Precision machined from 6061 billet aluminum and anodized for a long lasting and durable finish. Direct replacement for original plastic oil cap on all Yamaha 1.8L HO, SHO & SVHO engines. Includes...

Our Billet Aluminum Engine Oil Filler Cap adds durability and a custom look to your engine compartment. Precision machined from 6061 billet aluminum and anodized for a long lasting and durable finish. Direct replacement for original plastic oil cap on all Yamaha 1.8L HO, SHO & SVHO engines. Includes...

Our Engine Anode Cooling Adapter delivers additional water to Yamaha 1.8L engine blocks for custom cooling applications. Billet engine fitting includes sacrificial zinc anode to prevent corrosion in engine cooling passages. Key Features: Improved engine performance & reliability. Bill...

Easy to install Engine Breather Upgrade Kit eliminates power-robbing crankcase emissions from your engine's air intake. Increases horsepower by removing the engine's requirement to burn relatively non-combustible oil. In forced induction applications intercooler efficiency is improved by preventing ...

Our high quality viton seals are extremely resistant to heat and abrasion. Metal body holds it's shape under extreme conditions. Spring loaded wipers keep unwanted oil from contaminating combustion chambers and prevent air leakage through valve guides. Precision seal removal & installation tool is a...

Our high-quality ductile iron replacement sleeves are considerably harder and more abrasion resistant than OEM sleeves providing excellent oil retention, ring seal and the ultimate in leak down performance. Sleeves lock firmly into place during installation against machined step in engine block prev...