exhaust manifold

Hi, my name is Durham and I acquired a 2003 z4 3.0i 6MT about 4 months ago. now I have some money saved up for mods, but I am very confused and lost as to which headers I should get for my m54. I was considering the ones from racing dynamics but I’ve heard both good and bad things about them. I...

Oh well, guess it was due. Not sure if you all remember but when we needed to remove the exhaust for the sub frame refresh the flanges on the exhaust coupling between the cats and the rear section were in bad condition. Picture to enlighten those who don't :( We finished the sub frame...