Kong Performance Lightweight Billet Flywheel (+30HP) for Mercury 300R ls9portUpsell print out your emailed receipt

print out your emailed receipt and put that in a box with your supercharger(s)

and continuous high-RPM operation without breaking down

our flywheel is precision-balanced and significantly lighter than stock:

Our port work includes opening the snout inlet to 120mm to accept larger throttle bodies

On capable engines with supporting mods and fuel

Kong Performance Lightweight Billet Flywheel (+30HP) for Mercury 300R ls9portUpsell print out your emailed receiptKong Performance Billet Lightweight Flywheel for Mercury Racing 300R Tap into the simplest proven gain in performance for your Mercury Racing 300R with the Kong Performance Billet Lightweight Flywheel engineered for maximum performance, reliability, and simplicity. Key Features & Benefits Built In Ignition Timing AdvanceIncrease +30 horsepower per engine with our integrated timing advance design. No external modules, no complicated setupjust proven,