Well first you need to know what your shooting for. 4-2-1 header designs are good for mid range power/ torque, while 4-1 headers are ideal for high end RPM power. 4-2-1 headers have a better ground clearance, making it more ideal for daily driving. 2 piece 4-2-1 headers roughly weigh 1-2lbs heavier than than single piece 4-2-1 or 4-1 headers, but are easier to install without having to take out the traction bar, or radiator. You do get what you pay for, but some issues of high end headers from companies like Bisimoto, (and even one I've heard from a Hytech header) have had the welds crack, and one of my friends ebay headers I ceramic coated myself are still running strong (then again he dosn't dog on his motor so maybe thats why lol). So just do your research. Personally I would go with DC Sports, they have been around since the beginning and are best bang for the buck. Give them a call first, they will help you match up the best header for your motor/vehicle set up. Don't go for replica or ebay headers. Sure it cost a little more coin, so just save up
