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MaxTow carries LS Swap Engine Fitting Adapters. The set includes (2) Adapters and (2) Washers, the fittings needed to install aftermarket gauges on an LS engine. Essentially, this set allows a seamless transition for running any of your aftermarket gauges, and is also properly threaded to 1/8-27 NPT for easy installation of gauge sensors. Included are the necessary 16mm and 12mm adapters to replace: (1) The Oil Pressure Adapter, which is the factory sender in the back of the valley cover behind the intake; and (2) The Water (Coolant) Temperature, which replaces the plug in the passenger side cylinder head and is made for newer low profile senders. Female threads are 1/8-27 NPT. The 16mm and 12mm male threads are the correct metric threads for an LSX engine as well. MaxTow includes installation instructions, free lifetime technical support and a one year limited warranty with each purchase.