APR Performance - Subaru WRX/STI Side Rocker Extensions 15-21 rotors lightening of the vehicle is

lightening of the vehicle is absolutely essential

as well as improve the effectiveness of the splitter to maximize downforce

Signature x Pipe Design - Proper design leads to more power and not a choke point

• Boost control integrated with torque control system

Installation is extremely simple

APR Performance - Subaru WRX/STI Side Rocker Extensions 15-21 rotors lightening of the vehicle isAPR Side Rocker Extensions are the next step to help aerodynamically tune the handling of a car. Made of lightweight and durable carbon fiber composites, APR Side Rocker Extensions help reduce lift at high speeds by preventing air at the sides of the car from rolling underneath the car. The reduced lift helps to stabilize the car during high speed cornering and helps to increase traction for faster lap times. Features: Carbon Fiber Construction All