A small follow up question, if I may.
What is the difference between Tuned headers and (I assume) non-tuned headers?
Given the response above, I would assume that they just make a better exhaust note. Prior to this thread, I would have thought that it would be tuned to increase scavenging of the exhaust.
2009 Mustang V6: BBK CAI, BBK TB, GT500 STB