Beyea Performance Headers We offer Performance Headers, Merge Collectors and Tri Y Headers custom built to fit your need. With more than 15 years in the header fabrication business, we know how to customize your power curve to create a broader range of power. Each header or exhaust set up has been tried and tested. Used by many of the top Modified and Late Model race teams and engine builders across the U.S. We ship anywhere in the U.S. and guarantee the fit and performance of each header we sell. Our flanges are all 5/16 laser cut to ensure good support and seal. We have most port configurations in stock and can custom make others to fit your needs.