Jason, I'm talking comparitively. There'* a huge difference between the Series 1 and 2. The M62 is less efficient to begin with, which puts it in DANGEROUS KR land very quickly. And at a certain point, it'* nearly impossible to combat it.

We don't have the luxury of pulleying to hell and gone, then going back later to fight it with headers or an IC. You have to plan ahead, and not cross the line.

Stock boost on an M62 will be 8-9 PSI.

I'm not saying that that'* all he needs. But A good exhaust porting, and header set will go a long way on any engine.

I think he will have KR problems, and 2 range colder plugs are definetly necessary, as is the highest octane possible...