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big bore throttle body

  1. Big Bore Throttle Body - Calibration Tips

    Performance
    Hey guys, as you all may know there are throttle body upgrades available for 9th Gen Si's however there is very little information available on how to tune for it. We decided to provide settings that we found to work extremely well on our shop car, in order to calibrate for the SiriMoto Big Bore...
  2. 9th Gen Civic Si Big Bore Throttle Body Upgrade Kit!

    Intakes and TB Spacers
    This is a new throttle body upgrade kit we just started offering for 9th Gen Civic Si's. The throttle body used in this package is from a Honda J37 motor, and features a huge 80mm inlet that tapers to 70mm at the throttle plate. We use very high quality AN fittings as well. The bolts we use are...
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