4-2-1 headers, what brand is good at reasonable price??

[todas**t]

7kw out of headers alone is pretty banm good really.

tell me about it i know some 1 only gained 5 kw on headers exhurst cams and tunable ecu, made big kw on the at the workshop who worked on the car and they put it on a different dyno made shit power just like a stock car....