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4.0 exhaust

  1. Exhaust question

    Late Tacoma Tech
    On my 6cyl 4x4 ‘05 model I removed my factory exhaust. I installed new JBA headers with 2 1/2 inch exhaust flanges. I built a 2 1/2 inch Y-pipe that follows the same route as the factory. From there I switched to 3 inch and ran into a three chambered Flowmaster. This proved to be too loud so...