DC Sports headers are well-known for getting the best performance for your money. Most DC Sports 4-1 race header systems have been proven by dyno test to improve performance more than their other line ups. The DC Sports 4-1 race headers are designed for racing applications where the vehicle is being driven at or near redline. The DC Sports 4-1 race header design maximizes top end power whereas the DC Sports 4-2-1 header evenly distributes it throughout the power band.
The difference between DC Sports race headers and their normal headers is that the race header remove the catalytic converter. DC Sports Race headers are designed with aggressive flange and pipe size for better exhaust flow. Please note that the DC Sports Race Headers are NOT CARB approved due to the cat deletion. They are recommended for off-road use only.
DC Sports 4-1 race header units are precision bent on CNC mandrel benders. The header flanges are CNC machined. The flange-mating surfaces are machine-grinded to ensure a leak-free seal. The flanges are welded onto the header pipe using a robotic welder to achieve a uniform weld.
Most DC Sports 4-1 race header units are available in either stainless steel or ceramic. The stainless steel headers are made of T304 high-grade stainless steel. The ceramic headers are made of T409 mild steel applied with a ceramic coating. DC Sports 4-1 race ceramic header units have a matte finish to them for a more subdued look.
DC Sports 4-1 race header systems come with either the 1-piece or 2-piece design. The DC Sports 1-piece header design should have better airflow due to less air flow distortion but the 2-piece design is easier to install.
Your engine noise level should NOT change noticeably after a DC Sports 4-1 or 4-2-1 header has been installed.
DC Sports 4-1 race one-piece header units do NOT come with exhaust gaskets or hardware. DC Sports 4-1 race two-piece header units come with factory style O-rings and hardware to connect the two sections of the header. The stock factory head and donut gasket (if applicable) are durable enough to be reused with our product. If for some reasons your stock components are damaged, you can pick up replacement parts at your local car Dealer. DC Sports has elected to use factory parts because of the abundant supply.
Reference: DC Sports 4-1 race Header, DC Sports 4-to-1 race Header, DC Sports 4-1 race Exhaust Header.
APPLICATION: DC Sports 4-1 One Piece Polished Stainless Steel Race Header Honda Civic Si 2006-2009
