I had Tony from Fast Intentions measure the GT Haus inlet Y-Pipe and it measured at 2.17 and little less than 3.00 at the outlet. The catback section piping is 3.00. To be honest I was disappointed about the Y-Pipe measurement. However, it stills sound like a beast and can live with it.
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GT HAUS Exhaust / FI High Flow Cats / K&N Air Filters / UPREV Tune
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