Originally Posted by 04BlackFX4
that mustang sounded nice.. as for 4" piping, 1. it would look horrible on a small truck, and 2. it would perform horribly id imagine.
Not even so much that as the fact 4" is overkill, by far. 2.25" would be fine for most moderately modded V6s to maintain nice back pressure.
4" is overkill on a 302, I'm pretty sure your stock 4.0 can do without the massive piping, the difference in weight to 4" pipe is surprising as well.