car rear bumper diffuser lip 4 exhausts silver black fit for toyota corolla 2014-2018

accelerate the speed of the airflow underneath your car with this rear diffuser. at speed, it'll decrease the pressure under the car with a resulting increase in downforce. oversized exhaust cutouts accentuates and highlight your exhaust system, enhances rear end appearance of your car. improves the car's aerodynamic properties by enhancing the transition between the high speed rate airflow underneath the car and the much slower tream airflow of the ambient air. race-car inspired design creates a sophisticated look installs without cutting, trimming or altering the vehicle in any way. unique shark fin underspoiler design fully secure the diffuser, accelerates the airflow pass four out exhaust to make your car more sporty..syi