Tanabe TTB091F Sustec Front Tower Bar for 2003-2007 Mazda Mazda 6 Construction is reinforced extruded aluminum, which features dual reinforced lips on the underside, as well as tapered ends for additional rigidity The centershaft is very lightweight, so weight is not added to reinforce the chassis Adjustable preload can be adjusted and set Ultra durable steel end plates are 100 per cent steel for maximum strength and durability