Now now this may be a stupid noobish question, but that's beside the point. Can somebody please explain to me if and why are locally made headers from your exhaust shop are a waste of time and money,

AND

Would it be better to invest my money on imported goods such as buddyclub etc..

Would i be missing out on potential kw? increase air flow etc.., and if someone with experience of both goods give me there personal opinion on both, like for example if they've tried both on thier car, and noted obvious differences.

Thanks,,
Khaled