Gauge: $48.95 part # 10-01273 (it reads down to below 100*F and so can be used for cool-down)
Pre-turbo is a more accurate reading as it isn't affected by the amount of heat energy recovered by the turbo (variable).I wanted to make a note here. The setup from www.aircraftspruce.com that I would recommend is this:Gauge: $48.95 part # 10-01273 (it reads down to below 100*F and so can be used for cool-down)Sender: $23.85 part # 10-01478 (fast reacting with threaded installation good for pre-turbine)Lighting kit: $4.35 part # 10-01229 (you want to see it at night too)Total cost is less than $80. Not bad at all.Andrew