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This Turbosmart B‑frame T4 66mm turbine housing with 0.82 A/R combines a B‑frame inlet with a T4 outlet and a 66mm throat to manage exhaust flow for larger turbo installations. It’s intended for custom turbo systems where that flange and A/R ratio help tune spool characteristics and peak flow to match modified engine demands.
Turbosmart B Frame T4 0.82AR 66mm Turbine Housing
