Headers are an integral part to gaining performance on your vehicle. For turbocharged cars, headers go from the engine to the turbos. The better the design of these headers, the quicker the turbos will spool up. On normally aspirated vehicles, headers are the start of the exhaust system which when opened up, will give you a louder sounding vehicle that delivers more torque and performance. Headers can be done in different designs with merged collectors, log style, and equal length.