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

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 jointly by Race Marine and Motec using Kong Performance's 450R development engine. As seen in the product photos, the stock engine was first baseline tested. Next, the Kong 450R/500R kit was installed and tuned with a Motec ECU. The results were well over 150+ hp gain. These are verified and documented third party back to back dyno tests. NO TUNING REQUIRED!!! This package can be used and installed on an engine with zero computer modifications. HP gains will be less without