Designed to fit 2014+ Porsche 911 GT3 Product Details APR rear diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because a car displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air. To help channel the high speed air flow coming from underneath the car, APR carbon fiber rear 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. Features Reduce overall lift Cut down on drag-inducing turbulence Enhance high-speed stability Pattern 2x2 twill weave Material Pre-preg carbon fiber, 3K Coating UV-stable clear coat Mounting Pre-drilled holes to assist with mounting Hardware Stainless-steel machine screws, washers, and nuts About APR Performance Research Since 1999, APR Performance has been a market leader in producing and manufacturing high quality aerodynamic performance products for the aftermarket automobile industry. Development Computational Fluid Dynamics (CFD) analysis, combined with real-world track testing, help to ensure products meet stringent performance specifications. Production Proprietary manufacturing processes utilizing pre-preg. carbon fiber composites help to produce products that are durable, lightweight, and of the highest quality.