Original-equipment plastic front fender liners trap excess heat, robbing the Jeep Wrangler JK and JK Unlimited of horsepower and efficiency. Crawler Conceptz solves this problem with the industry's first complete vented fender liner! Brake-formed from high-quality sheet aluminum, the Crawler Conceptz Inner Fender Liner installs easily with minor drilling and adds additional clearance for oversized tires. These eye-catching fender liners are compatible with original equipment and most aftermarket fender flares, including, of course, Crawler Conceptz Ultra Series standard and skinny fender flares. Crawler Conceptz fender liners ship as bare aluminum to provide maximum customization options.