Anderson Composites 2017+ Camaro ZL1 Carbon Fiber Rear Diffuser Mass Rear Diffusers APR Performance Welcome to Extreme Dimensions :: Inventory Item :: 2016 2018 Chevrolet 2016 2018 Chevrolet Camaro Carbon Creations DriTech ZL1 Look Rear. Diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because your 2017 2023 Chevrolet Camaro ZL1 displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air. Features: To help channel the high speed air flow coming from underneath the car, diffusers redirects the high speed air flow to transition smoothly transition into the low pressure vacuum in the rear. This encourages a smoother flowing air flow underneath the car and allows better performance from other aerodynamic components such as aerodynamic wings.