Welcome to Extreme Dimensions :: Inventory Item :: 2016 2023 Chevrolet APR Splitter w Support Rods, Carbon Fiber :: 2017 2023 Camaro ZL1 Sf5bd5ea0029748d4afb35a82f1a12724g.jpg Welcome to Extreme Dimensions :: Inventory Item :: 2016 2023 Chevrolet Rear Diffusers APR Performance. 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.