How much performance gain from headers ??

[robokill]

1. Mild street cams, good for say 8 kW
2. 4-2-1 header, good for say 5 kW
3. Modified head with small increase in compression. Say 8 kW
4. Quad throttle conversion with trumpets. Say 5 kW
5. Programmeable ECU, GZE CAS and coils. Say 5 kW


This doesn't work as simple as stated. It all depends on how the engine is. (also its diffrent per engine)

Lets say you have a stock head. Than cams will help less than when you have a worked head. This also counts for headers .

If you modify the head properly and chance the cams I was able to make 133.4 whp with a standard header but modifed exhaust (after the 2 piece)

Lets say good headers and some itb's will help alot more once you already achieved a better standard setup.

Also remember that you don't want to stress the engine. So while thinking of these setups keepthat in mind!