I don't think the issue is so much ball bearing or non-ball bearing, it's cheap vs. expensive. Tomei's new line up of turbos are all non-ball bearing, and I don't consider ball bearing to necessarily be superior to a non. I think a couple people on here have run ISIS turbos and had good performance for the money with them. Ken at enjuku racing is boss at customer service and they have a great reputation. ISIS doesn't have nearly the R&D that other higher priced companies like Garrett have, but hey, if it works well and it's half the price why not?
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