Lovin me some s366 and some s483We sell both and I have ran both. I have a Garrett on the truck now and as tea bag said if you have money that's the way. But most do not the setup we sell is a very good one dual journal bearing 360 thrust washer most of you S300 series turbos do not have this. The ones I sell in my kit are built on a S330 and also run a larger shaft.You will also see a lower egt with these turbos with the built in gates and faster spool up.