mine are black duct taped to my steering column
Theres a boost gauge that goes in the ac vent (drivers) and it still allows air flow. I think egt is also available for that location. I havn't looked at gauges and holders in a while but I thought the AC vent one looked pretty tight.
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Learn how to use the feedback system! When people don't fallow through with a deal, fucking make it known! of course everyone has all positive points, no one fucking gives negatives for flakers, if you start giving negative feedbacks for flaking maybe people on tr will stop making stupid ass posts about wanting to buy shit then not showing up for the shit.