First- Headers
There is a lot more to them than just tube size, design makes a big difference on power/torque.
I prefer 304 stainless headers due to the long life. There are company's like ARH, Kooks and even TSP that have decent systems that will also last a long time.
The coated mild steel headers always rust and begin to rot. This greatly affects how the 02's work.
Tuning for headers- they can be tuned to pass emission testing- plug in test.
|