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I looked into inlet temp gauges and this is the by far the best in terms of quality. As its a wire probe, there is no need for drilling etc, just slip btw intercooler and manifold piping... http://www.nomadracing.com/catalog/p...products_id=44
Jaycar do a dual probe gauge - not as neat as group buy (it's a meter), but it uses standard k-type probes which can be fitted under pipework. Dual probe is good if you're looking at seeing what mods make what differences.