Porsche Improve horsepower and efficiency with the iconic Bursch high-performance headers for 914 models. Compatible with Bursch 914 muffler and most OE/Aftermarket mufflers. These headers are Mandrel Bent from 16 Gauge Steel for durability and merged for smooth flow. Only hand tools are needed for installation. This set is hand-made in Pasadena, CA. Lifetime warranty!