Tanabe TTB176F Sustec Tower Bar Tanabe Sustec Tower Bar: 2014 - 2015 Infiniti Q50 AWD/RWD Construction is reinforced extruded aluminum, which features dual reinforced lips on the underside, as well as tapered ends for additional rigidity The center shaft 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