Originally Posted by AllMudd
I feel differently than most people here. I do believe it helps a little with the Hp gain. Your not going to notice to much only because its on a 2.5. I did mine years back with a header and its definitely noticeable. I have also heard, not tried it yet, if you can get a 4.0 TB from a junk yard and swap over the sensors from your 2.5 TB there also will be a nice HP gain.
If you were to do a 4.0 tb, spacer, intake,5.0 ford injectors, header, and exhaust you would probably get a noticeable difference. But with just the spacer all your doing is making your intake air travel further.