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There is no magic.
The only reason EFR looks better or worse is its a half size smaller or bigger than the Garrett you're comparing it to.
EFRs always seem to have exhaust wheels 2-5mm bigger than a garrett with the same compressor inducer. So every review of a EFR ever: "it only spools 100-200rpm later and makes a bit more power and it doesn't hit transitioning into boost."
Shocking.
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