HKS 272's

[Onefast99gsx]

Well i pretty much said f**k it and ordered HKS 272's. I spent about 2 weeks of dicking around trying to find great reviews on about 3 other makes. I guess for the extra $120 or so, it's a good feeling not to think about the research anymore. I spend an incredible amount of time researching stuff.

Question: These are not predrilled and tapped. Does anyone have a how-to for that? I guess like drill size, tap size, how deep, etc.. Also what's the best way to center it? Does everyone do it in a lathe and horizontally drill it.

Thanks for the help!