Thanks for the input everyone.

Patch I'm sure a number of folks will be interested to know the results do please do keep us updated. David I'm keen to know the answer to the above question too.

teejay did you gain/lose any power when you put them on/went back?

Now that I actually get what headers are for can folks answer this... If I'm getting a good TBE and tune in the near future, can I easily have the headers installed at a later date without modifying the new TBE or anything else? Do they just bolt straight up? Keep in mind I have a 07 Lib GT. Thanks for your patience, I'm enjoying being educated!