Coolant is the life blood of a Slingshot. It is what keeps the accumulated heat from a Slingshot's engine from building up to destructive levels as well as the first line of defense against rust and corrosion. It stands to reason then, that having a reliable coolant tank is something of a necessity. Upgrading from the Slingshot's stock tank to a larger more durable one will help prevent against leaks as well as provide a better reservoir for it to draw from. This means a Slingshot's engine will be kept in better condition for longer, assuming the coolant inside is changed out at schedule intervals.