DC Sports 4 into 1 header systems are dyno tested to outperform all comparable header systems on the market. Extensive research and development goes into each system to ensure the best fit, finish and performance for your vehicle . DC Sports header systems are precision bent on our CNC mandrel benders using data acquired from our non-contact digitizing scanner. Our flanges are CNC machined, we attach the flange to the header pipes, then machine-grind the flange mating surface to ensure a leak-free seal. Our state-of-the-art manufacturing process ensures superior quality and a perfect fit with every header system we make. CAD - rendered , race-inspired 4-into-1 design emphasizes top-end power for extreme racing applications Unique merge collector ensures smooth exhaust gas flow and increases ground clearance