Drilling and Tapping your intake manifold is not required but is one form of installation that can be done. GlowShift offers a 1/8-27 NPT Drill and Tap Kit if you decide on this method of installation.
Luckily here at Glowshift Gauges, we give you more than one option when installing a boost gauge to your 2000-2006 Silverado/Sierra Duramax. We also offer a MAP line T-Adapter and a heater plug delete kit for the 2001-2004 Silverado/Sierra Duramax.
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