Out of all the cheap headers the MACs are probably the best. But if you plan on DDing the car they will collect a LOT of road grime where the primaries meet and rust up. Ask how I know... IMO, do it once, do it right, get stainless and don't get Pypes. SLP/Kooks/ARH.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.