Hello there! I'm hoping someone can clarify something for me. I'm replacing the valve cover gasket on my 2004 X5 3.0L. The hole for one of the valve cover to head studs is stripped, which seems to be a common problem, and easily fixed with a heli-coil. I've ordered a replacement stud from Pelican Parts (Part #11-12-1-718-856-M9) which is described as 7/6X29.5mm. Neither the service rep at Pelican nor Napa auto parts could tell me what size heli-coil kit to purchase. For those of you who have done this repair...what size heli-coil kit did you use?