Originally Posted by bob1987f

cool i did not know they were so similar. i thought the 01-04 stangs were 3v. im thinkin im just gunna go with a good cat back setup, a k&n drop in filter, and a good programmer and leave it.... i know the exhaust manifolds look very restrictive, but i wont waste the labor and money on headers till i learn whats the most restrictive areas on the 4.6's......the intake, throttle body, cats, might be worse than the manifolds for all i know....

still eager to learn about these mod motors as ive only owned one for about 4 months now.....i do love that grumble its got, which is why im going exhaust first