Subaru WRX/ STI Side Rocker Extensions 2015-2021 2015-2017 STI Bumper Grill Inserts are finished

Bumper Grill Inserts are finished with UV-stable

for a factory-like fitment

Carbon Fiber ConstructionAll APR Rear Bumper Skirts are made in carbon fiber composites for lightweight and high strength

Not designed for the Base model A4

Subaru WRX/ STI Side Rocker Extensions 2015-2021 2015-2017 STI Bumper Grill Inserts are finishedAPR 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