Cool, thanx alot for the help. I shoudn't have a problem with the header bolts at the H-pipe because I put on the mac H pipe and Cat-back. I try to do all the work myself on my mustangs, plus I used to work at a mechanic and speed shop so I've seen just about everything. But this is my first fuel injected mustang and there seems to be alot of stuff to clutter the engine compartment. But I can say that mac exhaust sounds awesome on 5.0's. I got them because I heard them on the mod motors just not the 5.0's and everybody has flowbastards on their mustangs. My snake roars with the flowpaths!!! Do you think I will get a better sound with aftermarket headers?
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