This pair of heat exchanger / headers is a perfect fit for your 1975-1977 Porsche 911. Made of high-quality steel material, these headers are durable and built to las.Designed specifically for your Porsche 911, these heat exchanger / headers are compatible with other parts of your car's exhaust and emission system. They are easy to install and will provide a smooth and efficient running experience for your car. Don't miss out on this opportunity to upgrade your car's heat exchanger / headers and enjoy a better driving experience.