Bursch stainless-steel 1 3/4" headers featuring proprietary heat exchangers and megaphone set with silencers. Made from high-quality 304 stainless steel, these headers are designed for 911 models 65-89 with 3.4-4.0 engines. Kit includes Bursch heat exchangers, Megaphone set, Stainless Steel support bracket and muffler installation kit with gaskets, studs, nuts, and washers. Lifetime warranty! Please inquire about special customizations or installation assistance.