DC Sports headers 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 headers are precision bent on CNC mandrel benders using data acquired from their non-contact digitizing scanner. The flanges are CNC machined, they then attach the flange to the header pipes, then machine-grind the flange-mating surface to ensure a leak-free seal. DC's state-of-the-art manufacturing process ensures superior quality and a perfect fit with every header system they make.