Mercury Racing 450R/500R Performance Upgrade Kit by Kong Performance

The Kong 450R/500R upgrade kit was developed from the ground up with the goals of increased efficiency, durability, and additional power delivered to an already fantastic engine. Each part was carefully thought out and designed to work together to create an absolutely incredible performance package.

BACK TO BACK DYNO TESTING

The Kong 450R/500R kit was tested back to back on an outboard engine Dyno at Race Marine in Australia. Testing was conducted by Race Marine using Kong Performance's 450R development engine. The Kong 450R/500R kit was installed and validated during extensive dyno testing. The dyno results were outstanding. All work was verified and documented with third party back to back dyno testing.

NO TUNING REQUIRED! EASY INSTALL!

This package can be installed on an engine with zero computer modifications. Low end, mid range, and top end gains are all very impressive. If you want a simple bolt on package that delivers fantastic bang for your buck, our easy to install package is the way to go.

100% Money Back Guarantee. If you are not satisfied with the results of the Kong upgrade kit after installation, you can remove it and send back for a full refund. We are confident that you will not want to remove this package after you experience the additional power.

WATER TESTED - PROVEN RESULTS - RECORD SETTING PERFORMANCE

The first public outing with the Kong 450R kit was at the Lake of the Ozarks 2024. We installed our Kong 450R upgrade kits on two Doug Wright Powerboats. Both boats ran 130+mph at the shootout and one setting a new all time outboard shootout record at 136mph.

What to expect? Massive difference in low end, mid range, and top end power. Idle, cruise, and drive just like stock. Perfect upgrade for everything from a single 450 engine all the way up to 4, 5 and 6 engine boats.

Kit Includes:

-KONG Billet High Flow Nose Drive w/ SC Pulley

-KONG Billet 100mm TB with O-ring air intake connection, marine grade electronics and seals

-KONG 450R/500R High Flow Air Intake

-All bolts, clamps, and hardware for installation is included.

Installation Time: Approximately 1-2 Hours Per Engine

***Prototype parts are seen in some product photos with a raw billet finish. All production parts will be anodized black for long term corrosion resistance.

This product is intended for enthusiasts who want maximum performance. Please be aware that installing aftermarket performance parts can affect your engine warranty. The manufacturer may refuse warranty service for issues related to or caused by this upgrade. By purchasing, you acknowledge this possibility and accept full responsibility.