single exhaust

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    Single Exhaust Piping After Stock Y Pipe For 1UZ

    Hello, first time user but does anyone know what size piping I should use for a single exhaust on a stock 1UZ? I know the general answer is 2.5 Inches but I want to keep the engine quiet. So I was thinking to get some OEM Mufflers to weld on but I know that could hurt airflow and power ratings...