okay, i have to defend OBX. This company is awesome if you aren't rich and have a boatload of cash to drop into your car. They Basically take tried & true designs from Various companies that have already done all the tedious dyno testing, remanufacture it themselves, down to the hightes tolerance, and offer it to the public for a MUCH lower price than the origional manufacturer. I, personally have Airmass headers (made by Holley) But I have one friend w/ a supercharged civic hatch, and he's running an OBX header, and is my friend w/ a very nice Del Sol. I'm running their reinforced silicone radiator hoses, Throttle Body spacer, and Underdrive pulley, and everything works just how it's supposed to.