G-Series II in 30 Seconds: How doing a CHRA swap can increase 10% in Higher Flow. Garrett’s G-Series II is built as a straightforward step up from the original G-Series, without forcing kit makers (or current owners) to re-fabricate the entire turbo system. The gains come from a redesigned CHRA new compressor aero, while retaining the existing compressor and turbine housings—which is why upgrading can often be as simple as a CHRA swap instead of a full turbo replacement. 💡What changes from Seri