ended up not using it as it did not come with the ferrell to hook the line into. used plastic t that came with gauge
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MaxTow's Boost T-Fitting Adapter allows you to avoid drilling and tapping into your intake manifold by cutting the MAP line and inserting the T-fitting in the two cut ends. The two included hose clamps allow you to tighten the two ends of MAP line to the T-fitting for an air tight seal which results in extremely accurate boost pressure readings. The T-fitting features a 1/8-27 NPT Female thread that can securely hold an electronic boost pressure sensor or compression fittings that will run the boost line directly to the back of the gauge.