Here's why:
* Engine Modifications: The amount of horsepower a header adds depends heavily on other modifications done to the engine. For example, a stock 350 with headers will see a smaller gain than a 350 with a performance camshaft, intake manifold, and other upgrades.
* Header Design: Different header designs have varying effects. Some headers are optimized for low-end torque, while others are designed for high-rpm power.
* Exhaust System: The rest of the exhaust system (including the catalytic converter and muffler) plays a role. A restrictive exhaust system will limit the gains from headers.
* Engine Condition: The health and tune of the engine also matter. A poorly tuned engine won't see as much benefit from headers.
General Expectations:
* On a stock 350, headers can typically add 10-20 horsepower.
* With other performance modifications, the gain could be 20-30 horsepower or more.
Key Benefits of Headers:
* Improved Exhaust Flow: Headers allow exhaust gases to flow more efficiently, reducing back pressure and improving engine breathing.
* Increased Power: This improved flow leads to increased horsepower and torque.
* Better Sound: Headers often give engines a more aggressive exhaust note.
Important Note: It's important to choose headers that are specifically designed for your application (engine size, year, and model) and to have them professionally installed for optimal results.
