Synergy Camaro Gen6 ZL1 Fender Expansion Tank now in stock! 2 Gallon Expansion Tank that mounts in the driver side fender. 100% Stealth, so no one can see the tank at all. It is designed to mount far from the heat in the engine bay, and not block the radiator like other tanks on the market. The expansion tank installs very easily, usually without removing the fender. Hoses and quick connects are included in the kit, and install is as simple as tapping in to two fittings. Top side bleeder for easy tank fill.