Get ready for a major increase in underhood temperature and noise, and chronic problems with gasket leaks at the header flanges. Unless you're planning to run at engine RPM's above 3,000 all the time, the only thing a set of headers does is make a visual impact when the hood is up. I've done numerous dyno runs with ram's horn manifolds VS headers, on some highly-modified engines, and there's no noticeable improvement in HP or torque in the low to midrange RPM area. If the engine is capable of normal street operation, it probably doesn't need headers.
Jerry
