DC Sports Headers 4-1 -Ceramic Coated. Looking to get the most out of your high revving, high performance motor ? Install a DC Sports 4-1 header and realize your motors full potential. Designed to make power from 4000 RMP to redline without losing any power on the bottom end. The DC Sports 4-1 header features a trapezoidal merged collector to increase ground clearance with out sacrificing performance. The near equal length primaries, CNC mandrel bent tubing and true merge collector ensure performance.