BlingLights rear bumper air diffuser made of CNC-machined billet t6061 aluminum. Proven to decrease wind drag for improved performance and fuel economy. Innovative design inspired from by Ferrari and Nascar. (2) 4mm thick, 15 (40cm) x 4 (10cm) Recent wind tunnel studies on the aerodynamics of most vehicles found that drag at the rear of the vehicle is the highest. As the car moves forward wind travels under the vehicle creating a siphon effect as large volume of air exits the rear. BlingLights diffusers create an outlet for the air to escape dramatically reducing drag at the car's most vulnerable location. To counteract the vortex effect Ferrari has added oversized rear air diffusers and so has many other performance vehicle manufacturers. BL-001 Rear Bumper Air Diffuser Specs:  (2) Rear Bumper Air Diffusers  CNC-machined billet t6061 aluminum  All mounting brackets included  Directions included  Proven to decrease drag  Indirectly improves performance  Protects rear bumper from scrapes  Will never rust or tarnish  (2) 4mm thick, 15 (40cm) x 4 (10cm)  Brand New in factory sealed packaging

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