The Hedman Hedders 21151 2.5-inch Ball/Socket Header Collector Conversion Kit provides a secure, leak-free connection for exhaust systems that use a ball-and-socket-style joint. Constructed from high-quality mild steel, this kit offers superior fitment, corrosion resistance, and long-term durability for performance and custom exhaust applications. Designed for universal compatibility, it allows smooth exhaust flow while reducing back pressure for optimal system performance. This part is intended for off-road, race, or custom vehicle use and does not alter or remove emissions control components when installed properly. The kit includes flanges and hardware required for professional installation. Manufactured by Hedman Hedders, a trusted name in high-performance exhaust technology. Not legal for sale or use on pollution-controlled vehicles in California or other states with similar regulations.