AEM Performance Electronics
X-Series wideband UEGO AFR gauge 30-0300
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Universal (52mm gauge)
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An electronics maker that began as a tuning shop in 1987, known for early plug-and-play standalone ECUs and the first wideband air/fuel gauge. Today it makes Infinity ECUs, gauges and fuel pumps, and has been part of Holley since 2021.
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