DC Sports, well known for its 4-2-1 design headers, recently developed a 4-1 header to add to its existing line-up. These headers were designed after the company's World Challenge Integra Type R race cars' headers, and are said to extract more horsepower throughout the powerband than any other 4-1 header. The header features large-diameter equal-length header tubes mated to an offset merge collector that provides better ground clearance, meaning you won't be scraping your header anytime soon. This header is said to have been dyno-proven to provide excellent top-end torque and power, as well as being CARB exempt and available in both ceramic-coated mild steel and a polished stainless steel.
Follow along as Frank from DC Sports installs a stainless steel 4-1 header onto a '99 Civic Si.