Agency Power has developed another key component for maximizing the performance of the Porsche 991 GT3, GT3RS and GT3RS 4.0. The new Agency Power Race Headers increase the exhaust flow allowing for a quicker throttle response and improved sports car sound. Manufactured using high quality T304 Stainless Steel and beautifully TIG welded to perfection. These Race Headers are intended for maximum performance and are perfect for individual looking for only the best out of their Porsche 991 GT3.