The TROPHYLITE R-4 is a spec class racer with heavy controls on the rules.
Your choice of sealed and tagged Ford or GM power train gives you choices to get what you want. These trucks are built to be the same so the hardware element is removed from the racing results. Everyone has the same General Grabber AT2 tires, the same Fox Racing shocks, the same Currie Enterprises rear end, the same 4130 chromoly chassis and suspension parts, the same Method Race wheels, and the same Earls Performance Plumbing.
When the trucks are identical and the ability to “buy” your way to the winner circle are controlled it leaves the racing to the driver and truck set up. By using the sealed engine program we can ensure that no team has any horsepower advantage over another. This removes the wallet race we have seen for so long in off-road racing.