Our Intake Manifold Upgrade Kit enables your Yamaha 1.8L engine to produce more horsepower by delivering increased air flow and boost pressure (+1lb). Precision tapered billet sleeve directly replaces restrictive mesh element in intake manifold. Provides improved low end punch and mid range pull thr...

The 'GEN-3' Yamaha SHO/SVHO Power Cooler Kit (intercooler system) features a huge cooler element that is rated for up to 600hp! High capacity cooler core resists heat soak under the most demanding high boost/high temperature applications. Delivers an increase of 20 peak horsepower over OEM intercool...

Proper fuel pressure is critical for stock and modified 4-stroke engines. This easy-to-use Fuel Pressure Test Kit for Yamaha & Kawasaki watercraft makes fast work of diganosing and troubleshooting fuel system issues. Installs between fuel rail and fuel pump module with supplied quick-connect fitting...

Our overhead Valve Spring Compression Tool allows easy removal of valve springs and keepers without removing cylinder head. Includes compression adapter to pressurize cylinder keeping valves in place during removal of stock springs and keepers. Fits both Yamaha 1.8L & Kawasaki 1.5L 4-stroke engines....

Our overhead Valve Spring Compression Tool allows easy removal of valve springs and keepers without removing cylinder head. Includes compression adapter to pressurize cylinder keeping valves in place during removal of stock springs and keepers. Fits both Yamaha 1.8L & Kawasaki 1.5L 4-stroke engines....

Our overhead Valve Spring Compression Tool allows easy removal of valve springs and keepers without removing cylinder head. Includes compression adapter to pressurize cylinder keeping valves in place during removal of stock springs and keepers. Fits both Yamaha 1.8L & Kawasaki 1.5L 4-stroke engines....

Replaces the restrictive sound suppression system on GPR's. Provides reduced back-pressure that improves engines performance and reduces harmful detonation. Easy installation with noticeable results. IJSBA Superstock legal....

Our ultra high-strength RIVA Cylinder Head Stud Kit is essential equipment when upgrading internal components on your high boost Yamaha engine. Precision machined from premium grade 8740 alloy and heat treated to exacting tolerances, these studs dramatically increase reliability & ease of maintenanc...

Our ultra high-strength cylinder head stud kit is essential equipment when upgrading internal components on your high boost Kawasaki engine. Precision machined from premium grade 8740 alloy and heat treated to exacting tolerances, these studs dramatically increase reliability & ease of maintenance. ...

Our ultra high-strength cylinder head stud kit is essential equipment when upgrading internal components on your high boost Sea-Doo engine. Precision machined from premium grade 8740 alloy and heat treated to exacting tolerances, these studs dramatically increase reliability & ease of maintenance. ...