Actually, G-Tech sells two models. The less expensive model does not have the tach function (GTech Pro). The more expensive model does(GTech Pro Competition). According to their website, the Competition senses engine rpm through the cigarette lighter voltage and does not need a direct connection to the engine.
Through their website the Pro is $139.95 and the Competition is $249.95 (both plus shipping and handling). Website is
www.gtechpro.com.
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2003 Almond GT AutoStick, body colored rear splash guards and hood struts, chrome gear shift, AC & vent knobs, billet steering wheel spokes and pedals, AMX1397 Turbo-Intake Pipe.