not trying to hijack this thread but what are the benefits and performance gains going from a cast wheel to a billet wheel on one of these 66mm turbos?i was told only a gain of 300 rpm on spool up and that's it.
Id pull the housing and measure up what you have both sides.
If it is an old P or Q trim turbine which it looks like I wouldn't stick any money in them IMO. Can get get much better turbos for cheap. Something like a cast s366
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