English to Polish Tech/Engineering Automotive / Cars & Trucks

Rather than buying the largest diameter exhaust headers available for your engine, you need to match the tube diameter to the needs of the engine. In other words, you need to tailor the engine’s powerband within the target operating RPM band.
If you want peak torque at, say, 4,000 rpm for a street car, the header tube diameter needs to accommodate this. If you have a racing engine where peak torque needs to be in the 6,000-rpm range and peak horsepower is in the 8,000-rpm range, you need to match the exhaust system to work best at those engine speeds. A street engine demands more torque at bottom and mid-range, while a race engine (depending on the application) can sacrifice bottom-end torque in favor of generating maximum horsepower. Header design is all about exhaust gas velocity.


to tailor the engine’s powerband within the target operating RPM band