I have headers and a tune........dealer said nothing. Its a TSB not a warranty issue, should be no problem. They will more than likely have to unbolt the drivers side header to get better access. Its a cross threaded nipple that occurred on some vehicles during assembly.....after time it develops a small coolant leak. There are lots of threads on this issue....check em out.
2010 Inferno Orange 2SS/RS M6 Black Leather,Sun Roof, Halltech cai, Delo 400 15w40, Ebay LED p13w DL, Lucas oil 80w90 gear oil, OBX LT's, Ebay gill decals, ACS T4, Shell Spirax ATF, Mike Norris tuned 413/419
Avenging Orange: 35 years of not buying into the Hype........and damn proud of it!!