For once I agree with you
Please dont bother doing cheap headers, I mean what is the point, really?! The make next to no difference on NA engine and if you go FI, they may well just blow apart
If you want to be hassling M3's then seriously you need to be trading in for one, or just be a better drive than the M3 you're trying to take on. The Zed has a very torquey engine, which is great as you can cruise at low revs, but if you want quick acceleration you need to be well up the rev range in anticipation.