Re: Don't hold your breath...
Well, I have had 3 different headers and I find nothing wrong with the ones I got from MSA. They all had the same thickness pipe, and I don't see how that matters much if they flow. Mine haven't even gotten hot enought to boil off all the paint so they are okay. The important thing is how they mount to the head so it doesn't warp, and I am satisfied there. I have the 2 and a half inch turbo exhaust from MSA as well. I have never seen any exhaust to have any thicker pipe and my dad and I have been restoring cars for 25 years(Rolls, Mercedes, Corvette, Pierce etc.). If you want thicker pipes, go to Home Depot and buy some chain link fence poles, that ought to do it. And the bends hardly pinch the pipe, and at 2 1/2" who cares? Especially a 2.4liter motor. I have a 3.0 and it is plenty. I did not like the muffler that came with it, so I used a Flowmaster for a Mustang, but I think I will add a resonator (too loud, but good sound). The price is right, and it was easy to install (both header and exhaust). And if you really like your car, you will do a better job yourself than some buttcracker at the local muffler shop. Been there, done that, got the T-shirt. Good luck, Z-cars are worth it!