Because of the nature of their design, monster trucks have a super high center of gravity which causes them to flip over very easily when cornering quickly. A simple fix to this is to limit the amount of down-travel in your suspension. This can be done quickly with droop adjustment screws on some chassis, but most MTs don't have droop adjustment; you'll have to limit the downward suspension travel manually. Cut short, equal length pieces of silicone fuel line to make limiters and install them onto your shock shafts below the piston, but before you slide your shock shaft into the shock body. The size of the limiter will depend on how much you want to limit your down-travel, but even 5 to 10mm will make a large difference to an MT's handling. Don't worry that you will lose some ground clearance with this modification; you will lose some, but this isn't a big issue because most trucks have so much clearance to begin with. The added benefit of a chassis that remains flatter through high-speed turns should put a smile on any trucker's face.